chrome/browser/chrome_content_browser_client.cc

// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "chrome/browser/chrome_content_browser_client.h"

#include <set>
#include <vector>

#include "base/bind.h"
#include "base/command_line.h"
#include "base/utf_string_conversions.h"
#include "chrome/app/breakpad_mac.h"
#include "chrome/browser/browser_about_handler.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/browsing_data_remover.h"
#include "chrome/browser/character_encoding.h"
#include "chrome/browser/chrome_benchmarking_message_filter.h"
#include "chrome/browser/chrome_quota_permission_context.h"
#include "chrome/browser/content_settings/content_settings_utils.h"
#include "chrome/browser/content_settings/cookie_settings.h"
#include "chrome/browser/content_settings/host_content_settings_map.h"
#include "chrome/browser/content_settings/tab_specific_content_settings.h"
#include "chrome/browser/download/download_util.h"
#include "chrome/browser/extensions/api/webrequest/webrequest_api.h"
#include "chrome/browser/extensions/extension_info_map.h"
#include "chrome/browser/extensions/extension_message_handler.h"
#include "chrome/browser/extensions/extension_service.h"
#include "chrome/browser/extensions/extension_web_ui.h"
#include "chrome/browser/extensions/extension_webkit_preferences.h"
#include "chrome/browser/geolocation/chrome_access_token_store.h"
#include "chrome/browser/google/google_util.h"
#include "chrome/browser/net/chrome_net_log.h"
#include "chrome/browser/notifications/desktop_notification_service.h"
#include "chrome/browser/notifications/desktop_notification_service_factory.h"
#include "chrome/browser/platform_util.h"
#include "chrome/browser/prefs/pref_service.h"
#include "chrome/browser/prefs/scoped_user_pref_update.h"
#include "chrome/browser/prerender/prerender_manager.h"
#include "chrome/browser/prerender/prerender_manager_factory.h"
#include "chrome/browser/prerender/prerender_tracker.h"
#include "chrome/browser/printing/printing_message_filter.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/profiles/profile_io_data.h"
#include "chrome/browser/renderer_host/chrome_render_message_filter.h"
#include "chrome/browser/renderer_host/chrome_render_view_host_observer.h"
#include "chrome/browser/renderer_host/plugin_info_message_filter.h"
#include "chrome/browser/search_engines/search_provider_install_state_message_filter.h"
#include "chrome/browser/speech/chrome_speech_input_manager.h"
#include "chrome/browser/spellchecker/spellcheck_message_filter.h"
#include "chrome/browser/ssl/ssl_add_cert_handler.h"
#include "chrome/browser/ssl/ssl_blocking_page.h"
#include "chrome/browser/tab_contents/tab_contents_ssl_helper.h"
#include "chrome/browser/tab_contents/tab_util.h"
#include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
#include "chrome/browser/ui/webui/chrome_web_ui_factory.h"
#include "chrome/browser/user_style_sheet_watcher.h"
#include "chrome/common/child_process_logging.h"
#include "chrome/common/chrome_constants.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/extensions/extension.h"
#include "chrome/common/extensions/extension_set.h"
#include "chrome/common/logging_chrome.h"
#include "chrome/common/pref_names.h"
#include "chrome/common/render_messages.h"
#include "chrome/common/url_constants.h"
#include "content/browser/browser_url_handler.h"
#include "content/browser/child_process_security_policy.h"
#include "content/browser/gpu/gpu_data_manager.h"
#include "content/browser/gpu/gpu_process_host.h"
#include "content/browser/plugin_process_host.h"
#include "content/browser/renderer_host/render_view_host.h"
#include "content/browser/resource_context.h"
#include "content/browser/ssl/ssl_cert_error_handler.h"
#include "content/browser/ssl/ssl_client_auth_handler.h"
#include "content/browser/worker_host/worker_process_host.h"
#include "content/public/browser/browser_main_parts.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/site_instance.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_contents_view.h"
#include "grit/generated_resources.h"
#include "grit/ui_resources.h"
#include "net/base/cookie_monster.h"
#include "net/base/cookie_options.h"
#include "net/base/network_change_notifier.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/resource/resource_bundle.h"
#include "webkit/glue/webpreferences.h"

#if defined(OS_WIN)
#include "chrome/browser/chrome_browser_main_win.h"
#elif defined(OS_MACOSX)
#include "chrome/browser/chrome_browser_main_mac.h"
#include "chrome/browser/spellchecker/spellcheck_message_filter_mac.h"
#elif defined(OS_CHROMEOS)
#include "chrome/browser/chromeos/chrome_browser_main_chromeos.h"
#elif defined(OS_LINUX) || defined(OS_OPENBSD)
#include "chrome/browser/chrome_browser_main_linux.h"
#elif defined(OS_POSIX)
#include "chrome/browser/chrome_browser_main_posix.h"
#endif

#if defined(TOOLKIT_USES_GTK)
#include "chrome/browser/chrome_browser_main_extra_parts_gtk.h"
#endif

#if defined(TOOLKIT_VIEWS)
#include "chrome/browser/chrome_browser_main_extra_parts_views.h"
#endif

#if defined(USE_AURA)
#include "chrome/browser/chrome_browser_main_extra_parts_aura.h"
#endif

#if defined(OS_LINUX) || defined(OS_OPENBSD)
#include "base/linux_util.h"
#include "chrome/browser/crash_handler_host_linux.h"
#endif

#if defined(TOOLKIT_VIEWS)
#include "chrome/browser/ui/views/tab_contents/tab_contents_view_views.h"
#elif defined(TOOLKIT_USES_GTK)
#include "chrome/browser/tab_contents/chrome_tab_contents_view_wrapper_gtk.h"
#include "content/browser/tab_contents/tab_contents_view_gtk.h"
#elif defined(OS_MACOSX)
#include "chrome/browser/tab_contents/moving_to_content/tab_contents_view_mac.h"
#endif

#if defined(USE_NSS)
#include "chrome/browser/ui/crypto_module_password_dialog.h"
#endif

using content::AccessTokenStore;
using content::BrowserThread;
using content::SiteInstance;
using content::WebContents;

namespace {

// Handles rewriting Web UI URLs.
bool HandleWebUI(GURL* url, content::BrowserContext* browser_context) {
  if (!ChromeWebUIFactory::GetInstance()->UseWebUIForURL(browser_context, *url))
    return false;

  // Special case the new tab page. In older versions of Chrome, the new tab
  // page was hosted at chrome-internal:<blah>. This might be in people's saved
  // sessions or bookmarks, so we say any URL with that scheme triggers the new
  // tab page.
  if (url->SchemeIs(chrome::kChromeInternalScheme)) {
    // Rewrite it with the proper new tab URL.
    *url = GURL(chrome::kChromeUINewTabURL);
  }

  return true;
}

// Used by the GetPrivilegeRequiredByUrl() and GetProcessPrivilege() functions
// below.  Extension, and isolated apps require different privileges to be
// granted to their RenderProcessHosts.  This classification allows us to make
// sure URLs are served by hosts with the right set of privileges.
enum RenderProcessHostPrivilege {
  PRIV_NORMAL,
  PRIV_HOSTED,
  PRIV_ISOLATED,
  PRIV_EXTENSION,
};

RenderProcessHostPrivilege GetPrivilegeRequiredByUrl(
    const GURL& url,
    ExtensionService* service) {
  // Default to a normal renderer cause it is lower privileged. This should only
  // occur if the URL on a site instance is either malformed, or uninitialized.
  // If it is malformed, then there is no need for better privileges anyways.
  // If it is uninitialized, but eventually settles on being an a scheme other
  // than normal webrenderer, the navigation logic will correct us out of band
  // anyways.
  if (!url.is_valid())
    return PRIV_NORMAL;

  if (url.SchemeIs(chrome::kExtensionScheme)) {
    const Extension* extension =
        service->extensions()->GetByID(url.host());
    if (extension && extension->is_storage_isolated())
      return PRIV_ISOLATED;
    if (extension && extension->is_hosted_app())
      return PRIV_HOSTED;

    return PRIV_EXTENSION;
  }

  return PRIV_NORMAL;
}

RenderProcessHostPrivilege GetProcessPrivilege(
    content::RenderProcessHost* process_host,
    extensions::ProcessMap* process_map,
    ExtensionService* service) {
  std::set<std::string> extension_ids =
      process_map->GetExtensionsInProcess(process_host->GetID());
  if (extension_ids.empty())
    return PRIV_NORMAL;

  for (std::set<std::string>::iterator iter = extension_ids.begin();
       iter != extension_ids.end(); ++iter) {
    const Extension* extension = service->GetExtensionById(*iter, false);
    if (extension && extension->is_storage_isolated())
      return PRIV_ISOLATED;
    if (extension && extension->is_hosted_app())
      return PRIV_HOSTED;
  }

  return PRIV_EXTENSION;
}

bool IsIsolatedAppInProcess(const GURL& site_url,
                            content::RenderProcessHost* process_host,
                            extensions::ProcessMap* process_map,
                            ExtensionService* service) {
  std::set<std::string> extension_ids =
      process_map->GetExtensionsInProcess(process_host->GetID());
  if (extension_ids.empty())
    return false;

  for (std::set<std::string>::iterator iter = extension_ids.begin();
       iter != extension_ids.end(); ++iter) {
    const Extension* extension = service->GetExtensionById(*iter, false);
    if (extension &&
        extension->is_storage_isolated() &&
        extension->url() == site_url)
      return true;
  }

  return false;
}

bool CertMatchesFilter(const net::X509Certificate& cert,
                       const base::DictionaryValue& filter) {
  // TODO(markusheintz): This is the minimal required filter implementation.
  // Implement a better matcher.

  // An empty filter matches any client certificate since no requirements are
  // specified at all.
  if (filter.empty())
    return true;

  std::string common_name;
  if (filter.GetString("ISSUER.CN", &common_name) &&
      (cert.issuer().common_name == common_name)) {
    return true;
  }
  return false;
}

// Fills |map| with the per-script font prefs under path |map_name|.
void FillFontFamilyMap(const PrefService* prefs,
                       const char* map_name,
                       WebPreferences::ScriptFontFamilyMap* map) {
  for (size_t i = 0; i < prefs::kWebKitScriptsForFontFamilyMapsLength; ++i) {
    const char* script = prefs::kWebKitScriptsForFontFamilyMaps[i];
    std::string pref_name = base::StringPrintf("%s.%s", map_name, script);
    std::string font_family = prefs->GetString(pref_name.c_str());
    if (!font_family.empty())
      map->push_back(std::make_pair(script, UTF8ToUTF16(font_family)));
  }
}

}  // namespace

namespace chrome {

content::BrowserMainParts* ChromeContentBrowserClient::CreateBrowserMainParts(
    const content::MainFunctionParams& parameters) {
  ChromeBrowserMainParts* main_parts;
  // Construct the Main browser parts based on the OS type.
#if defined(OS_WIN)
  main_parts = new ChromeBrowserMainPartsWin(parameters);
#elif defined(OS_MACOSX)
  main_parts = new ChromeBrowserMainPartsMac(parameters);
#elif defined(OS_CHROMEOS)
  main_parts = new ChromeBrowserMainPartsChromeos(parameters);
#elif defined(OS_LINUX) || defined(OS_OPENBSD)
  main_parts = new ChromeBrowserMainPartsLinux(parameters);
#elif defined(OS_POSIX)
  main_parts = new ChromeBrowserMainPartsPosix(parameters);
#else
  NOTREACHED();
  main_parts = new ChromeBrowserMainParts(parameters);
#endif

  // Construct additional browser parts. Stages are called in the order in
  // which they are added.
#if defined(TOOLKIT_USES_GTK)
  main_parts->AddParts(new ChromeBrowserMainExtraPartsGtk());
#endif

#if defined(TOOLKIT_VIEWS)
  main_parts->AddParts(new ChromeBrowserMainExtraPartsViews());
#endif

#if defined(USE_AURA)
  main_parts->AddParts(new ChromeBrowserMainExtraPartsAura());
#endif

  return main_parts;
}

content::WebContentsView* ChromeContentBrowserClient::CreateWebContentsView(
    WebContents* web_contents) {
#if defined(TOOLKIT_VIEWS)
  return new TabContentsViewViews(web_contents);
#elif defined(TOOLKIT_USES_GTK)
  return new content::TabContentsViewGtk(web_contents,
                                         new ChromeTabContentsViewWrapperGtk);
#elif defined(OS_MACOSX)
  return tab_contents_view_mac::CreateWebContentsView(web_contents);
#else
#error Need to create your platform WebContentsView here.
#endif
}

void ChromeContentBrowserClient::RenderViewHostCreated(
    RenderViewHost* render_view_host) {

  SiteInstance* site_instance = render_view_host->site_instance();
  Profile* profile = Profile::FromBrowserContext(
      site_instance->GetBrowserContext());

  new ChromeRenderViewHostObserver(render_view_host,
                                   profile->GetNetworkPredictor());
  new ExtensionMessageHandler(render_view_host);
}

void ChromeContentBrowserClient::RenderProcessHostCreated(
    content::RenderProcessHost* host) {
  int id = host->GetID();
  Profile* profile = Profile::FromBrowserContext(host->GetBrowserContext());
  host->GetChannel()->AddFilter(new ChromeRenderMessageFilter(
      id, profile, profile->GetRequestContextForRenderProcess(id)));
  host->GetChannel()->AddFilter(new PluginInfoMessageFilter(id, profile));
  host->GetChannel()->AddFilter(new PrintingMessageFilter());
  host->GetChannel()->AddFilter(
      new SearchProviderInstallStateMessageFilter(id, profile));
  host->GetChannel()->AddFilter(new SpellCheckMessageFilter(id));
#if defined(OS_MACOSX)
  host->GetChannel()->AddFilter(new SpellCheckMessageFilterMac());
#endif
  host->GetChannel()->AddFilter(new ChromeBenchmarkingMessageFilter(
      id, profile, profile->GetRequestContextForRenderProcess(id)));

  host->Send(new ChromeViewMsg_SetIsIncognitoProcess(
      profile->IsOffTheRecord()));

  SendExtensionWebRequestStatusToHost(host);

  RendererContentSettingRules rules;
  GetRendererContentSettingRules(profile->GetHostContentSettingsMap(), &rules);
  host->Send(new ChromeViewMsg_SetContentSettingRules(rules));
}

content::WebUIFactory* ChromeContentBrowserClient::GetWebUIFactory() {
  return ChromeWebUIFactory::GetInstance();
}

GURL ChromeContentBrowserClient::GetEffectiveURL(
    content::BrowserContext* browser_context, const GURL& url) {
  Profile* profile = Profile::FromBrowserContext(browser_context);
  // Get the effective URL for the given actual URL. If the URL is part of an
  // installed app, the effective URL is an extension URL with the ID of that
  // extension as the host. This has the effect of grouping apps together in
  // a common SiteInstance.
  if (!profile || !profile->GetExtensionService())
    return url;

  const Extension* extension = profile->GetExtensionService()->extensions()->
      GetHostedAppByURL(ExtensionURLInfo(url));
  if (!extension)
    return url;

  // Bookmark apps do not use the hosted app process model, and should be
  // treated as normal URLs.
  if (extension->from_bookmark())
    return url;

  // If the URL is part of an extension's web extent, convert it to an
  // extension URL.
  return extension->GetResourceURL(url.path());
}

bool ChromeContentBrowserClient::ShouldUseProcessPerSite(
    content::BrowserContext* browser_context, const GURL& effective_url) {
  // Non-extension URLs should generally use process-per-site-instance.
  // Because we expect to use the effective URL, URLs for hosted apps (apart
  // from bookmark apps) should have an extension scheme by now.
  if (!effective_url.SchemeIs(chrome::kExtensionScheme))
    return false;

  Profile* profile = Profile::FromBrowserContext(browser_context);
  if (!profile || !profile->GetExtensionService())
    return false;

  const Extension* extension = profile->GetExtensionService()->extensions()->
      GetExtensionOrAppByURL(ExtensionURLInfo(effective_url));
  if (!extension)
    return false;

  // If the URL is part of a hosted app that does not have the background
  // permission, we want to give each instance its own process to improve
  // responsiveness.
  if (extension->GetType() == Extension::TYPE_HOSTED_APP &&
      !extension->HasAPIPermission(ExtensionAPIPermission::kBackground))
    return false;

  // Hosted apps that have the background permission must use process per site,
  // since all instances can make synchronous calls to the background window.
  // Other extensions should use process per site as well.
  return true;
}

bool ChromeContentBrowserClient::IsURLSameAsAnySiteInstance(const GURL& url) {
  return url == GURL(chrome::kChromeUICrashURL) ||
         url == GURL(chrome::kChromeUIKillURL) ||
         url == GURL(chrome::kChromeUIHangURL) ||
         url == GURL(chrome::kChromeUIShorthangURL);
}

bool ChromeContentBrowserClient::IsHandledURL(const GURL& url) {
  return ProfileIOData::IsHandledURL(url);
}

bool ChromeContentBrowserClient::IsSuitableHost(
    content::RenderProcessHost* process_host,
    const GURL& site_url) {
  Profile* profile =
      Profile::FromBrowserContext(process_host->GetBrowserContext());
  ExtensionService* service = profile->GetExtensionService();
  extensions::ProcessMap* process_map = service->process_map();

  // Don't allow the Task Manager to share a process with anything else.
  // Otherwise it can affect the renderers it is observing.
  // Note: we could create another RenderProcessHostPrivilege bucket for
  // this to allow multiple chrome://tasks instances to share, but that's
  // a very unlikely case without serious consequences.
  if (site_url.GetOrigin() == GURL(chrome::kChromeUITaskManagerURL).GetOrigin())
    return false;

  // These may be NULL during tests. In that case, just assume any site can
  // share any host.
  if (!service || !process_map)
    return true;

  // Experimental:
  // If --enable-strict-site-isolation is enabled, do not allow non-WebUI pages
  // to share a renderer process.  (We could allow pages from the same site or
  // extensions of the same type to share, if we knew what the given process
  // was dedicated to.  Allowing no sharing is simpler for now.)  This may
  // cause resource exhaustion issues if too many sites are open at once.
  const CommandLine& command_line = *CommandLine::ForCurrentProcess();
  if (command_line.HasSwitch(switches::kEnableStrictSiteIsolation))
    return false;

  // An isolated app is only allowed to share with the exact same app in order
  // to provide complete renderer process isolation.  This also works around
  // issue http://crbug.com/85588, where different isolated apps in the same
  // process would end up using the first app's storage contexts.
  RenderProcessHostPrivilege privilege_required =
      GetPrivilegeRequiredByUrl(site_url, service);
  if (privilege_required == PRIV_ISOLATED)
    return IsIsolatedAppInProcess(site_url, process_host, process_map, service);

  // Otherwise, just make sure the process privilege matches the privilege
  // required by the site.
  return GetProcessPrivilege(process_host, process_map, service) ==
      privilege_required;
}

void ChromeContentBrowserClient::SiteInstanceGotProcess(
    SiteInstance* site_instance) {
  CHECK(site_instance->HasProcess());

  Profile* profile = Profile::FromBrowserContext(
      site_instance->GetBrowserContext());
  ExtensionService* service = profile->GetExtensionService();
  if (!service)
    return;

  const Extension* extension =
      service->extensions()->GetExtensionOrAppByURL(ExtensionURLInfo(
          site_instance->GetSite()));
  if (!extension)
    return;

  service->process_map()->Insert(extension->id(),
                                 site_instance->GetProcess()->GetID(),
                                 site_instance->GetId());
  BrowserThread::PostTask(
      BrowserThread::IO, FROM_HERE,
      base::Bind(&ExtensionInfoMap::RegisterExtensionProcess,
                 profile->GetExtensionInfoMap(),
                 extension->id(),
                 site_instance->GetProcess()->GetID(),
                 site_instance->GetId()));
}

void ChromeContentBrowserClient::SiteInstanceDeleting(
    SiteInstance* site_instance) {
  if (!site_instance->HasProcess())
    return;

  Profile* profile = Profile::FromBrowserContext(
      site_instance->GetBrowserContext());
  ExtensionService* service = profile->GetExtensionService();
  if (!service)
    return;

  const Extension* extension =
      service->extensions()->GetExtensionOrAppByURL(
          ExtensionURLInfo(site_instance->GetSite()));
  if (!extension)
    return;

  service->process_map()->Remove(extension->id(),
                                 site_instance->GetProcess()->GetID(),
                                 site_instance->GetId());
  BrowserThread::PostTask(
      BrowserThread::IO, FROM_HERE,
      base::Bind(&ExtensionInfoMap::UnregisterExtensionProcess,
                 profile->GetExtensionInfoMap(),
                 extension->id(),
                 site_instance->GetProcess()->GetID(),
                 site_instance->GetId()));
}

bool ChromeContentBrowserClient::ShouldSwapProcessesForNavigation(
    const GURL& current_url,
    const GURL& new_url) {
  if (current_url.is_empty()) {
    // Always choose a new process when navigating to extension URLs. The
    // process grouping logic will combine all of a given extension's pages
    // into the same process.
    if (new_url.SchemeIs(chrome::kExtensionScheme))
      return true;

    return false;
  }

  // Also, we must switch if one is an extension and the other is not the exact
  // same extension.
  if (current_url.SchemeIs(chrome::kExtensionScheme) ||
      new_url.SchemeIs(chrome::kExtensionScheme)) {
    if (current_url.GetOrigin() != new_url.GetOrigin())
      return true;
  }

  return false;
}

std::string ChromeContentBrowserClient::GetCanonicalEncodingNameByAliasName(
    const std::string& alias_name) {
  return CharacterEncoding::GetCanonicalEncodingNameByAliasName(alias_name);
}

void ChromeContentBrowserClient::AppendExtraCommandLineSwitches(
    CommandLine* command_line, int child_process_id) {
#if defined(USE_LINUX_BREAKPAD)
  if (IsCrashReporterEnabled()) {
    command_line->AppendSwitchASCII(switches::kEnableCrashReporter,
        child_process_logging::GetClientId() + "," + base::GetLinuxDistro());
  }
#elif defined(OS_MACOSX)
  if (IsCrashReporterEnabled()) {
    command_line->AppendSwitchASCII(switches::kEnableCrashReporter,
                                    child_process_logging::GetClientId());
  }
#endif  // OS_MACOSX

  if (logging::DialogsAreSuppressed())
    command_line->AppendSwitch(switches::kNoErrorDialogs);

  std::string process_type =
      command_line->GetSwitchValueASCII(switches::kProcessType);
  const CommandLine& browser_command_line = *CommandLine::ForCurrentProcess();
  if (process_type == switches::kRendererProcess) {
    FilePath user_data_dir =
        browser_command_line.GetSwitchValuePath(switches::kUserDataDir);
    if (!user_data_dir.empty())
      command_line->AppendSwitchPath(switches::kUserDataDir, user_data_dir);
#if defined(OS_CHROMEOS)
    const std::string& login_profile =
        browser_command_line.GetSwitchValueASCII(switches::kLoginProfile);
    if (!login_profile.empty())
      command_line->AppendSwitchASCII(switches::kLoginProfile, login_profile);
#endif

    content::RenderProcessHost* process =
        content::RenderProcessHost::FromID(child_process_id);
    if (process) {
      Profile* profile = Profile::FromBrowserContext(
          process->GetBrowserContext());
      extensions::ProcessMap* process_map =
          profile->GetExtensionService()->process_map();
      if (process_map && process_map->Contains(process->GetID()))
        command_line->AppendSwitch(switches::kExtensionProcess);

      PrefService* prefs = profile->GetPrefs();
      // Currently this pref is only registered if applied via a policy.
      if (prefs->HasPrefPath(prefs::kDisable3DAPIs) &&
          prefs->GetBoolean(prefs::kDisable3DAPIs)) {
        // Turn this policy into a command line switch.
        command_line->AppendSwitch(switches::kDisable3DAPIs);
      }

      // Disable client-side phishing detection in the renderer if it is
      // disabled in the Profile preferences or the browser process.
      if (!prefs->GetBoolean(prefs::kSafeBrowsingEnabled) ||
          !g_browser_process->safe_browsing_detection_service()) {
        command_line->AppendSwitch(
            switches::kDisableClientSidePhishingDetection);
      }
    }
    {
      PrefService* local_state = g_browser_process->local_state();
      if (local_state &&
          !local_state->GetBoolean(prefs::kPrintPreviewDisabled)) {
        command_line->AppendSwitch(switches::kRendererPrintPreview);
      }
    }

    // Please keep this in alphabetical order.
    static const char* const kSwitchNames[] = {
      switches::kAllowHTTPBackgroundPage,
      switches::kAllowLegacyExtensionManifests,
      switches::kAllowNaClSocketAPI,
      switches::kAllowScriptingGallery,
      switches::kAppsCheckoutURL,
      switches::kAppsGalleryURL,
      switches::kCloudPrintServiceURL,
      switches::kDebugPrint,
      switches::kDomAutomationController,
      switches::kDumpHistogramsOnExit,
      switches::kEnableBenchmarking,
      switches::kEnableClickToPlay,
      switches::kEnableCrxlessWebApps,
      switches::kEnableExperimentalExtensionApis,
      switches::kEnableInBrowserThumbnailing,
      switches::kEnableIPCFuzzing,
      switches::kEnableNaCl,
      switches::kEnablePlatformApps,
      switches::kEnableSearchProviderApiV2,
      switches::kEnableWatchdog,
      switches::kExperimentalSpellcheckerFeatures,
      switches::kMemoryProfiling,
      switches::kMessageLoopHistogrammer,
      switches::kNoRunningInsecureContent,
      switches::kPpapiFlashArgs,
      switches::kPpapiFlashInProcess,
      switches::kPpapiFlashPath,
      switches::kPpapiFlashVersion,
      switches::kProfilingAtStart,
      switches::kProfilingFile,
      switches::kProfilingFlush,
      switches::kSilentDumpOnDCHECK,
    };

    command_line->CopySwitchesFrom(browser_command_line, kSwitchNames,
                                   arraysize(kSwitchNames));
  } else if (process_type == switches::kUtilityProcess) {
    if (browser_command_line.HasSwitch(
            switches::kEnableExperimentalExtensionApis)) {
      command_line->AppendSwitch(switches::kEnableExperimentalExtensionApis);
    }
  } else if (process_type == switches::kPluginProcess) {
    static const char* const kSwitchNames[] = {
  #if defined(OS_CHROMEOS)
      switches::kLoginProfile,
  #endif
      switches::kMemoryProfiling,
      switches::kSilentDumpOnDCHECK,
      switches::kUserDataDir,
    };

    command_line->CopySwitchesFrom(browser_command_line, kSwitchNames,
                                   arraysize(kSwitchNames));
  } else if (process_type == switches::kZygoteProcess) {
    static const char* const kSwitchNames[] = {
      switches::kUserDataDir,  // Make logs go to the right file.
      // Load (in-process) Pepper plugins in-process in the zygote pre-sandbox.
      switches::kPpapiFlashInProcess,
      switches::kPpapiFlashPath,
      switches::kPpapiFlashVersion,
    };

    command_line->CopySwitchesFrom(browser_command_line, kSwitchNames,
                                   arraysize(kSwitchNames));
  }

  // The command line switch kEnableBenchmarking needs to be specified along
  // with the kEnableStatsTable switch to ensure that the stats table global
  // is initialized correctly.
  if (command_line->HasSwitch(switches::kEnableBenchmarking))
    DCHECK(command_line->HasSwitch(switches::kEnableStatsTable));
}

std::string ChromeContentBrowserClient::GetApplicationLocale() {
  return g_browser_process->GetApplicationLocale();
}

std::string ChromeContentBrowserClient::GetAcceptLangs(
    content::BrowserContext* context) {
  Profile* profile = Profile::FromBrowserContext(context);
  return profile->GetPrefs()->GetString(prefs::kAcceptLanguages);
}

SkBitmap* ChromeContentBrowserClient::GetDefaultFavicon() {
  ResourceBundle& rb = ResourceBundle::GetSharedInstance();
  return rb.GetBitmapNamed(IDR_DEFAULT_FAVICON);
}

bool ChromeContentBrowserClient::AllowAppCache(
    const GURL& manifest_url,
    const GURL& first_party,
    const content::ResourceContext& context) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
  ProfileIOData* io_data =
      reinterpret_cast<ProfileIOData*>(context.GetUserData(NULL));
  return io_data->GetCookieSettings()->
      IsSettingCookieAllowed(manifest_url, first_party);
}

bool ChromeContentBrowserClient::AllowGetCookie(
    const GURL& url,
    const GURL& first_party,
    const net::CookieList& cookie_list,
    const content::ResourceContext& context,
    int render_process_id,
    int render_view_id) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
  ProfileIOData* io_data =
      reinterpret_cast<ProfileIOData*>(context.GetUserData(NULL));
  bool allow = io_data->GetCookieSettings()->
      IsReadingCookieAllowed(url, first_party);

  BrowserThread::PostTask(
      BrowserThread::UI, FROM_HERE,
      base::Bind(&TabSpecificContentSettings::CookiesRead, render_process_id,
                 render_view_id, url, cookie_list, !allow));
  return allow;
}

bool ChromeContentBrowserClient::AllowSetCookie(
    const GURL& url,
    const GURL& first_party,
    const std::string& cookie_line,
    const content::ResourceContext& context,
    int render_process_id,
    int render_view_id,
    net::CookieOptions* options) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
  ProfileIOData* io_data =
      reinterpret_cast<ProfileIOData*>(context.GetUserData(NULL));

  CookieSettings* cookie_settings = io_data->GetCookieSettings();
  bool allow = cookie_settings->IsSettingCookieAllowed(url, first_party);

  if (cookie_settings->IsCookieSessionOnly(url))
    options->set_force_session();

  BrowserThread::PostTask(
      BrowserThread::UI, FROM_HERE,
      base::Bind(&TabSpecificContentSettings::CookieChanged, render_process_id,
                 render_view_id, url, cookie_line, *options, !allow));
  return allow;
}

bool ChromeContentBrowserClient::AllowSaveLocalState(
    const content::ResourceContext& context) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
  ProfileIOData* io_data =
      reinterpret_cast<ProfileIOData*>(context.GetUserData(NULL));
  return !io_data->clear_local_state_on_exit()->GetValue();
}

bool ChromeContentBrowserClient::AllowWorkerDatabase(
    int worker_route_id,
    const GURL& url,
    const string16& name,
    const string16& display_name,
    unsigned long estimated_size,
    WorkerProcessHost* worker_process_host) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
  ProfileIOData* io_data = reinterpret_cast<ProfileIOData*>(
      worker_process_host->resource_context()->GetUserData(NULL));
  CookieSettings* cookie_settings = io_data->GetCookieSettings();
  bool allow = cookie_settings->IsSettingCookieAllowed(url, url);

  // Record access to database for potential display in UI: Find the worker
  // instance and forward the message to all attached documents.
  WorkerProcessHost::Instances::const_iterator i;
  for (i = worker_process_host->instances().begin();
       i != worker_process_host->instances().end(); ++i) {
    if (i->worker_route_id() != worker_route_id)
      continue;
    const WorkerDocumentSet::DocumentInfoSet& documents =
        i->worker_document_set()->documents();
    for (WorkerDocumentSet::DocumentInfoSet::const_iterator doc =
         documents.begin(); doc != documents.end(); ++doc) {
      BrowserThread::PostTask(
          BrowserThread::UI, FROM_HERE,
          base::Bind(
              &TabSpecificContentSettings::WebDatabaseAccessed,
              doc->render_process_id(), doc->render_view_id(),
              url, name, display_name, !allow));
    }
    break;
  }

  return allow;
}

bool ChromeContentBrowserClient::AllowWorkerFileSystem(
    int worker_route_id,
    const GURL& url,
    WorkerProcessHost* worker_process_host) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
  ProfileIOData* io_data = reinterpret_cast<ProfileIOData*>(
      worker_process_host->resource_context()->GetUserData(NULL));
  CookieSettings* cookie_settings = io_data->GetCookieSettings();
  bool allow = cookie_settings->IsSettingCookieAllowed(url, url);

  // Record access to file system for potential display in UI: Find the worker
  // instance and forward the message to all attached documents.
  WorkerProcessHost::Instances::const_iterator i;
  for (i = worker_process_host->instances().begin();
       i != worker_process_host->instances().end(); ++i) {
    if (i->worker_route_id() != worker_route_id)
      continue;
    const WorkerDocumentSet::DocumentInfoSet& documents =
        i->worker_document_set()->documents();
    for (WorkerDocumentSet::DocumentInfoSet::const_iterator doc =
         documents.begin(); doc != documents.end(); ++doc) {
      BrowserThread::PostTask(
          BrowserThread::UI, FROM_HERE,
          base::Bind(
              &TabSpecificContentSettings::FileSystemAccessed,
              doc->render_process_id(), doc->render_view_id(), url, !allow));
    }
    break;
  }

  return allow;
}

net::URLRequestContext*
ChromeContentBrowserClient::OverrideRequestContextForURL(
    const GURL& url, const content::ResourceContext& context) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
  if (url.SchemeIs(chrome::kExtensionScheme)) {
    ProfileIOData* io_data =
        reinterpret_cast<ProfileIOData*>(context.GetUserData(NULL));
    return io_data->extensions_request_context();
  }

  return NULL;
}

QuotaPermissionContext*
ChromeContentBrowserClient::CreateQuotaPermissionContext() {
  return new ChromeQuotaPermissionContext();
}

void ChromeContentBrowserClient::OpenItem(const FilePath& path) {
  platform_util::OpenItem(path);
}

void ChromeContentBrowserClient::ShowItemInFolder(const FilePath& path) {
  platform_util::ShowItemInFolder(path);
}

void ChromeContentBrowserClient::AllowCertificateError(
    SSLCertErrorHandler* handler,
    bool overridable,
    const base::Callback<void(SSLCertErrorHandler*, bool)>& callback) {
  // If the tab is being prerendered, cancel the prerender and the request.
  WebContents* tab = tab_util::GetWebContentsByID(
      handler->render_process_host_id(),
      handler->tab_contents_id());
  if (!tab) {
    NOTREACHED();
    return;
  }
  prerender::PrerenderManager* prerender_manager =
      prerender::PrerenderManagerFactory::GetForProfile(
          Profile::FromBrowserContext(tab->GetBrowserContext()));
  if (prerender_manager && prerender_manager->IsWebContentsPrerendering(tab)) {
    if (prerender_manager->prerender_tracker()->TryCancel(
            handler->render_process_host_id(),
            handler->tab_contents_id(),
            prerender::FINAL_STATUS_SSL_ERROR)) {
      handler->CancelRequest();
      return;
    }
  }

  // Otherwise, display an SSL blocking page.
  SSLBlockingPage* blocking_page = new SSLBlockingPage(
      handler, overridable, callback);
  blocking_page->Show();
}

void ChromeContentBrowserClient::SelectClientCertificate(
    int render_process_id,
    int render_view_id,
    SSLClientAuthHandler* handler) {
  WebContents* tab = tab_util::GetWebContentsByID(
      render_process_id, render_view_id);
  if (!tab) {
    NOTREACHED();
    return;
  }

  net::SSLCertRequestInfo* cert_request_info = handler->cert_request_info();
  GURL requesting_url("https://" + cert_request_info->host_and_port);
  DCHECK(requesting_url.is_valid()) << "Invalid URL string: https://"
                                    << cert_request_info->host_and_port;

  Profile* profile = Profile::FromBrowserContext(tab->GetBrowserContext());
  DCHECK(profile);
  scoped_ptr<Value> filter(
      profile->GetHostContentSettingsMap()->GetWebsiteSetting(
          requesting_url,
          requesting_url,
          CONTENT_SETTINGS_TYPE_AUTO_SELECT_CERTIFICATE,
          std::string(), NULL));

  if (filter.get()) {
    // Try to automatically select a client certificate.
    if (filter->IsType(Value::TYPE_DICTIONARY)) {
      DictionaryValue* filter_dict =
          static_cast<DictionaryValue*>(filter.get());

      const std::vector<scoped_refptr<net::X509Certificate> >&
          all_client_certs = cert_request_info->client_certs;
      for (size_t i = 0; i < all_client_certs.size(); ++i) {
        if (CertMatchesFilter(*all_client_certs[i], *filter_dict)) {
          // Use the first certificate that is matched by the filter.
          handler->CertificateSelected(all_client_certs[i]);
          return;
        }
      }
    } else {
      NOTREACHED();
    }
  }

  TabContentsWrapper* wrapper =
      TabContentsWrapper::GetCurrentWrapperForContents(tab);
  if (!wrapper) {
    // If there is no TabContentsWrapper for the given WebContents then we can't
    // show the user a dialog to select a client certificate. So we simply
    // proceed with no client certificate.
    handler->CertificateSelected(NULL);
    return;
  }
  wrapper->ssl_helper()->ShowClientCertificateRequestDialog(handler);
}

void ChromeContentBrowserClient::AddNewCertificate(
    net::URLRequest* request,
    net::X509Certificate* cert,
    int render_process_id,
    int render_view_id) {
  // The handler will run the UI and delete itself when it's finished.
  new SSLAddCertHandler(request, cert, render_process_id, render_view_id);
}

void ChromeContentBrowserClient::RequestDesktopNotificationPermission(
    const GURL& source_origin,
    int callback_context,
    int render_process_id,
    int render_view_id) {
  RenderViewHost* rvh = RenderViewHost::FromID(
      render_process_id, render_view_id);
  if (!rvh) {
    NOTREACHED();
    return;
  }

  content::RenderProcessHost* process = rvh->process();
  Profile* profile = Profile::FromBrowserContext(process->GetBrowserContext());
  DesktopNotificationService* service =
      DesktopNotificationServiceFactory::GetForProfile(profile);
  service->RequestPermission(
      source_origin, render_process_id, render_view_id, callback_context,
      tab_util::GetWebContentsByID(render_process_id, render_view_id));
}

WebKit::WebNotificationPresenter::Permission
    ChromeContentBrowserClient::CheckDesktopNotificationPermission(
        const GURL& source_origin,
        const content::ResourceContext& context,
        int render_process_id) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
  ProfileIOData* io_data =
      reinterpret_cast<ProfileIOData*>(context.GetUserData(NULL));

  if (io_data->GetExtensionInfoMap()->SecurityOriginHasAPIPermission(
        source_origin, render_process_id,
        ExtensionAPIPermission::kNotification))
    return WebKit::WebNotificationPresenter::PermissionAllowed;

  // Fall back to the regular notification preferences, which works on an
  // origin basis.
  return io_data->GetNotificationService() ?
      io_data->GetNotificationService()->HasPermission(source_origin) :
      WebKit::WebNotificationPresenter::PermissionNotAllowed;
}

void ChromeContentBrowserClient::ShowDesktopNotification(
    const content::ShowDesktopNotificationHostMsgParams& params,
    int render_process_id,
    int render_view_id,
    bool worker) {
  RenderViewHost* rvh = RenderViewHost::FromID(
      render_process_id, render_view_id);
  if (!rvh) {
    NOTREACHED();
    return;
  }

  content::RenderProcessHost* process = rvh->process();
  Profile* profile = Profile::FromBrowserContext(process->GetBrowserContext());
  DesktopNotificationService* service =
      DesktopNotificationServiceFactory::GetForProfile(profile);
  service->ShowDesktopNotification(
    params, render_process_id, render_view_id,
    worker ? DesktopNotificationService::WorkerNotification :
        DesktopNotificationService::PageNotification);
}

void ChromeContentBrowserClient::CancelDesktopNotification(
    int render_process_id,
    int render_view_id,
    int notification_id) {
  RenderViewHost* rvh = RenderViewHost::FromID(
      render_process_id, render_view_id);
  if (!rvh) {
    NOTREACHED();
    return;
  }

  content::RenderProcessHost* process = rvh->process();
  Profile* profile = Profile::FromBrowserContext(process->GetBrowserContext());
  DesktopNotificationService* service =
      DesktopNotificationServiceFactory::GetForProfile(profile);
  service->CancelDesktopNotification(
      render_process_id, render_view_id, notification_id);
}

bool ChromeContentBrowserClient::CanCreateWindow(
    const GURL& source_origin,
    WindowContainerType container_type,
    const content::ResourceContext& context,
    int render_process_id) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
  // If the opener is trying to create a background window but doesn't have
  // the appropriate permission, fail the attempt.
  if (container_type == WINDOW_CONTAINER_TYPE_BACKGROUND) {
    ProfileIOData* io_data =
        reinterpret_cast<ProfileIOData*>(context.GetUserData(NULL));
    return io_data->GetExtensionInfoMap()->SecurityOriginHasAPIPermission(
        source_origin, render_process_id, ExtensionAPIPermission::kBackground);
  }
  return true;
}

std::string ChromeContentBrowserClient::GetWorkerProcessTitle(
    const GURL& url, const content::ResourceContext& context) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
  // Check if it's an extension-created worker, in which case we want to use
  // the name of the extension.
  ProfileIOData* io_data =
      reinterpret_cast<ProfileIOData*>(context.GetUserData(NULL));
  const Extension* extension =
      io_data->GetExtensionInfoMap()->extensions().GetByID(url.host());
  return extension ? extension->name() : std::string();
}

void ChromeContentBrowserClient::ResourceDispatcherHostCreated() {
  return g_browser_process->ResourceDispatcherHostCreated();
}

ui::Clipboard* ChromeContentBrowserClient::GetClipboard() {
  return g_browser_process->clipboard();
}

MHTMLGenerationManager*
    ChromeContentBrowserClient::GetMHTMLGenerationManager() {
  return g_browser_process->mhtml_generation_manager();
}

net::NetLog* ChromeContentBrowserClient::GetNetLog() {
  return g_browser_process->net_log();
}

speech_input::SpeechInputManager*
    ChromeContentBrowserClient::GetSpeechInputManager() {
  return speech_input::ChromeSpeechInputManager::GetInstance();
}

AccessTokenStore* ChromeContentBrowserClient::CreateAccessTokenStore() {
  return new ChromeAccessTokenStore();
}

bool ChromeContentBrowserClient::IsFastShutdownPossible() {
  const CommandLine& browser_command_line = *CommandLine::ForCurrentProcess();
  return !browser_command_line.HasSwitch(switches::kChromeFrame);
}

WebPreferences ChromeContentBrowserClient::GetWebkitPrefs(RenderViewHost* rvh) {
  Profile* profile = Profile::FromBrowserContext(
      rvh->process()->GetBrowserContext());
  PrefService* prefs = profile->GetPrefs();
  WebPreferences web_prefs;

  web_prefs.standard_font_family =
      UTF8ToUTF16(prefs->GetString(prefs::kWebKitGlobalStandardFontFamily));
  web_prefs.fixed_font_family =
      UTF8ToUTF16(prefs->GetString(prefs::kWebKitGlobalFixedFontFamily));
  web_prefs.serif_font_family =
      UTF8ToUTF16(prefs->GetString(prefs::kWebKitGlobalSerifFontFamily));
  web_prefs.sans_serif_font_family =
      UTF8ToUTF16(prefs->GetString(prefs::kWebKitGlobalSansSerifFontFamily));
  web_prefs.cursive_font_family =
      UTF8ToUTF16(prefs->GetString(prefs::kWebKitGlobalCursiveFontFamily));
  web_prefs.fantasy_font_family =
      UTF8ToUTF16(prefs->GetString(prefs::kWebKitGlobalFantasyFontFamily));

  FillFontFamilyMap(prefs, prefs::kWebKitStandardFontFamilyMap,
                    &web_prefs.standard_font_family_map);
  FillFontFamilyMap(prefs, prefs::kWebKitFixedFontFamilyMap,
                    &web_prefs.fixed_font_family_map);
  FillFontFamilyMap(prefs, prefs::kWebKitSerifFontFamilyMap,
                    &web_prefs.serif_font_family_map);
  FillFontFamilyMap(prefs, prefs::kWebKitSansSerifFontFamilyMap,
                    &web_prefs.sans_serif_font_family_map);
  FillFontFamilyMap(prefs, prefs::kWebKitCursiveFontFamilyMap,
                    &web_prefs.cursive_font_family_map);
  FillFontFamilyMap(prefs, prefs::kWebKitFantasyFontFamilyMap,
                    &web_prefs.fantasy_font_family_map);

  web_prefs.default_font_size =
      prefs->GetInteger(prefs::kWebKitGlobalDefaultFontSize);
  web_prefs.default_fixed_font_size =
      prefs->GetInteger(prefs::kWebKitGlobalDefaultFixedFontSize);
  web_prefs.minimum_font_size =
      prefs->GetInteger(prefs::kWebKitGlobalMinimumFontSize);
  web_prefs.minimum_logical_font_size =
      prefs->GetInteger(prefs::kWebKitGlobalMinimumLogicalFontSize);

  web_prefs.default_encoding = prefs->GetString(prefs::kGlobalDefaultCharset);

  web_prefs.javascript_can_open_windows_automatically =
      prefs->GetBoolean(
          prefs::kWebKitGlobalJavascriptCanOpenWindowsAutomatically);
  web_prefs.dom_paste_enabled =
      prefs->GetBoolean(prefs::kWebKitDomPasteEnabled);
  web_prefs.shrinks_standalone_images_to_fit =
      prefs->GetBoolean(prefs::kWebKitShrinksStandaloneImagesToFit);
  const DictionaryValue* inspector_settings =
      prefs->GetDictionary(prefs::kWebKitInspectorSettings);
  if (inspector_settings) {
    for (DictionaryValue::key_iterator iter(inspector_settings->begin_keys());
         iter != inspector_settings->end_keys(); ++iter) {
      std::string value;
      if (inspector_settings->GetStringWithoutPathExpansion(*iter, &value))
          web_prefs.inspector_settings.push_back(
              std::make_pair(*iter, value));
    }
  }
  web_prefs.tabs_to_links = prefs->GetBoolean(prefs::kWebkitTabsToLinks);

  {  // Command line switches are used for preferences with no user interface.
    const CommandLine& command_line = *CommandLine::ForCurrentProcess();
    web_prefs.developer_extras_enabled = true;
    web_prefs.javascript_enabled =
        !command_line.HasSwitch(switches::kDisableJavaScript) &&
        prefs->GetBoolean(prefs::kWebKitGlobalJavascriptEnabled);
    web_prefs.web_security_enabled =
        !command_line.HasSwitch(switches::kDisableWebSecurity) &&
        prefs->GetBoolean(prefs::kWebKitWebSecurityEnabled);
    web_prefs.plugins_enabled =
        !command_line.HasSwitch(switches::kDisablePlugins) &&
        prefs->GetBoolean(prefs::kWebKitGlobalPluginsEnabled);
    web_prefs.java_enabled =
        !command_line.HasSwitch(switches::kDisableJava) &&
        prefs->GetBoolean(prefs::kWebKitJavaEnabled);
    web_prefs.loads_images_automatically =
        prefs->GetBoolean(prefs::kWebKitGlobalLoadsImagesAutomatically);
    web_prefs.uses_page_cache =
        command_line.HasSwitch(switches::kEnableFastback);
    web_prefs.remote_fonts_enabled =
        !command_line.HasSwitch(switches::kDisableRemoteFonts);
    web_prefs.xss_auditor_enabled =
        !command_line.HasSwitch(switches::kDisableXSSAuditor);
    web_prefs.application_cache_enabled =
        !command_line.HasSwitch(switches::kDisableApplicationCache);

    web_prefs.local_storage_enabled =
        !command_line.HasSwitch(switches::kDisableLocalStorage);
    web_prefs.databases_enabled =
        !command_line.HasSwitch(switches::kDisableDatabases);
    web_prefs.webaudio_enabled =
        !command_line.HasSwitch(switches::kDisableWebAudio);
    web_prefs.experimental_webgl_enabled =
        GpuProcessHost::gpu_enabled() &&
        !command_line.HasSwitch(switches::kDisable3DAPIs) &&
        !prefs->GetBoolean(prefs::kDisable3DAPIs) &&
        !command_line.HasSwitch(switches::kDisableExperimentalWebGL);
    web_prefs.gl_multisampling_enabled =
        !command_line.HasSwitch(switches::kDisableGLMultisampling);
    web_prefs.privileged_webgl_extensions_enabled =
        command_line.HasSwitch(switches::kEnablePrivilegedWebGLExtensions);
    web_prefs.site_specific_quirks_enabled =
        !command_line.HasSwitch(switches::kDisableSiteSpecificQuirks);
    web_prefs.allow_file_access_from_file_urls =
        command_line.HasSwitch(switches::kAllowFileAccessFromFiles);
    web_prefs.show_composited_layer_borders =
        command_line.HasSwitch(switches::kShowCompositedLayerBorders);
    web_prefs.show_composited_layer_tree =
        command_line.HasSwitch(switches::kShowCompositedLayerTree);
    web_prefs.show_fps_counter =
        command_line.HasSwitch(switches::kShowFPSCounter);
    web_prefs.accelerated_compositing_enabled =
        GpuProcessHost::gpu_enabled() &&
        !command_line.HasSwitch(switches::kDisableAcceleratedCompositing);
    web_prefs.threaded_compositing_enabled =
        command_line.HasSwitch(switches::kEnableThreadedCompositing);
    web_prefs.force_compositing_mode =
        command_line.HasSwitch(switches::kForceCompositingMode);
    web_prefs.fixed_position_compositing_enabled =
        command_line.HasSwitch(switches::kEnableCompositingForFixedPosition);
    web_prefs.allow_webui_compositing =
        command_line.HasSwitch(switches::kAllowWebUICompositing);
    web_prefs.accelerated_2d_canvas_enabled =
        GpuProcessHost::gpu_enabled() &&
        !command_line.HasSwitch(switches::kDisableAccelerated2dCanvas);
    web_prefs.accelerated_painting_enabled =
        GpuProcessHost::gpu_enabled() &&
        command_line.HasSwitch(switches::kEnableAcceleratedPainting);
    web_prefs.accelerated_filters_enabled =
        GpuProcessHost::gpu_enabled() &&
        command_line.HasSwitch(switches::kEnableAcceleratedFilters);
    web_prefs.accelerated_layers_enabled =
        !command_line.HasSwitch(switches::kDisableAcceleratedLayers);
    web_prefs.composite_to_texture_enabled =
        command_line.HasSwitch(switches::kEnableCompositeToTexture);
    web_prefs.accelerated_plugins_enabled =
        !command_line.HasSwitch(switches::kDisableAcceleratedPlugins);
    web_prefs.accelerated_video_enabled =
        !command_line.HasSwitch(switches::kDisableAcceleratedVideo);
    web_prefs.partial_swap_enabled =
        command_line.HasSwitch(switches::kEnablePartialSwap);
    web_prefs.memory_info_enabled =
        prefs->GetBoolean(prefs::kEnableMemoryInfo);
    web_prefs.interactive_form_validation_enabled =
        !command_line.HasSwitch(switches::kDisableInteractiveFormValidation);
    web_prefs.fullscreen_enabled =
        !command_line.HasSwitch(switches::kDisableFullScreen);
    web_prefs.allow_displaying_insecure_content =
        prefs->GetBoolean(prefs::kWebKitAllowDisplayingInsecureContent);
    web_prefs.allow_running_insecure_content =
        prefs->GetBoolean(prefs::kWebKitAllowRunningInsecureContent);

#if defined(OS_MACOSX)
    bool default_enable_scroll_animator = true;
#else
    // On CrOS, the launcher always passes in the --enable flag.
    bool default_enable_scroll_animator = false;
#endif
    web_prefs.enable_scroll_animator = default_enable_scroll_animator;
    if (command_line.HasSwitch(switches::kEnableSmoothScrolling))
      web_prefs.enable_scroll_animator = true;
    if (command_line.HasSwitch(switches::kDisableSmoothScrolling))
      web_prefs.enable_scroll_animator = false;

    // The user stylesheet watcher may not exist in a testing profile.
    if (profile->GetUserStyleSheetWatcher()) {
      web_prefs.user_style_sheet_enabled = true;
      web_prefs.user_style_sheet_location =
          profile->GetUserStyleSheetWatcher()->user_style_sheet();
    } else {
      web_prefs.user_style_sheet_enabled = false;
    }

    web_prefs.visual_word_movement_enabled =
        command_line.HasSwitch(switches::kEnableVisualWordMovement);
    web_prefs.unified_textchecker_enabled =
        command_line.HasSwitch(switches::kExperimentalSpellcheckerFeatures);
    web_prefs.per_tile_painting_enabled =
        command_line.HasSwitch(switches::kEnablePerTilePainting);
  }

  {  // Certain GPU features might have been blacklisted.
    GpuDataManager* gpu_data_manager = GpuDataManager::GetInstance();
    DCHECK(gpu_data_manager);
    uint32 blacklist_flags = gpu_data_manager->GetGpuFeatureFlags().flags();
    if (blacklist_flags & GpuFeatureFlags::kGpuFeatureAcceleratedCompositing)
      web_prefs.accelerated_compositing_enabled = false;
    if (blacklist_flags & GpuFeatureFlags::kGpuFeatureWebgl)
      web_prefs.experimental_webgl_enabled = false;
    if (blacklist_flags & GpuFeatureFlags::kGpuFeatureAccelerated2dCanvas)
      web_prefs.accelerated_2d_canvas_enabled = false;
    if (blacklist_flags & GpuFeatureFlags::kGpuFeatureMultisampling)
      web_prefs.gl_multisampling_enabled = false;

    // Accelerated video is slower than regular when using a software 3d
    // rasterizer.
    if (gpu_data_manager->software_rendering())
      web_prefs.accelerated_video_enabled = false;
  }

  web_prefs.uses_universal_detector =
      prefs->GetBoolean(prefs::kWebKitUsesUniversalDetector);
  web_prefs.text_areas_are_resizable =
      prefs->GetBoolean(prefs::kWebKitTextAreasAreResizable);
  web_prefs.hyperlink_auditing_enabled =
      prefs->GetBoolean(prefs::kEnableHyperlinkAuditing);

  // Make sure we will set the default_encoding with canonical encoding name.
  web_prefs.default_encoding =
      CharacterEncoding::GetCanonicalEncodingNameByAliasName(
          web_prefs.default_encoding);
  if (web_prefs.default_encoding.empty()) {
    prefs->ClearPref(prefs::kGlobalDefaultCharset);
    web_prefs.default_encoding = prefs->GetString(prefs::kGlobalDefaultCharset);
  }
  DCHECK(!web_prefs.default_encoding.empty());

  if (ChildProcessSecurityPolicy::GetInstance()->HasWebUIBindings(
          rvh->process()->GetID())) {
    web_prefs.loads_images_automatically = true;
    web_prefs.javascript_enabled = true;
  }

  web_prefs.is_online = !net::NetworkChangeNotifier::IsOffline();

  ExtensionService* service = profile->GetExtensionService();
  if (service) {
    const Extension* extension = service->extensions()->GetByID(
        rvh->site_instance()->GetSite().host());
    extension_webkit_preferences::SetPreferences(
        extension, rvh->delegate()->GetRenderViewType(), &web_prefs);
  }

  if (rvh->delegate()->GetRenderViewType() == chrome::VIEW_TYPE_NOTIFICATION) {
    web_prefs.allow_scripts_to_close_windows = true;
  } else if (rvh->delegate()->GetRenderViewType() ==
             chrome::VIEW_TYPE_BACKGROUND_CONTENTS) {
    // Disable all kinds of acceleration for background pages.
    // See http://crbug.com/96005 and http://crbug.com/96006
    web_prefs.force_compositing_mode = false;
    web_prefs.accelerated_compositing_enabled = false;
    web_prefs.accelerated_2d_canvas_enabled = false;
    web_prefs.accelerated_video_enabled = false;
    web_prefs.accelerated_painting_enabled = false;
    web_prefs.accelerated_plugins_enabled = false;
  }

  return web_prefs;
}

void ChromeContentBrowserClient::UpdateInspectorSetting(
    RenderViewHost* rvh, const std::string& key, const std::string& value) {
  content::BrowserContext* browser_context =
      rvh->process()->GetBrowserContext();
  DictionaryPrefUpdate update(
      Profile::FromBrowserContext(browser_context)->GetPrefs(),
      prefs::kWebKitInspectorSettings);
  DictionaryValue* inspector_settings = update.Get();
  inspector_settings->SetWithoutPathExpansion(key,
                                              Value::CreateStringValue(value));
}

void ChromeContentBrowserClient::ClearInspectorSettings(RenderViewHost* rvh) {
  content::BrowserContext* browser_context =
      rvh->process()->GetBrowserContext();
  Profile::FromBrowserContext(browser_context)->GetPrefs()->
      ClearPref(prefs::kWebKitInspectorSettings);
}

void ChromeContentBrowserClient::BrowserURLHandlerCreated(
    BrowserURLHandler* handler) {
  // Add the default URL handlers.
  handler->AddHandlerPair(&ExtensionWebUI::HandleChromeURLOverride,
                          BrowserURLHandler::null_handler());
  handler->AddHandlerPair(BrowserURLHandler::null_handler(),
                          &ExtensionWebUI::HandleChromeURLOverrideReverse);

  // about: handler. Must come before chrome: handler, since it will
  // rewrite about: urls to chrome: URLs and then expect chrome: to
  // actually handle them.
  handler->AddHandlerPair(&WillHandleBrowserAboutURL,
                          BrowserURLHandler::null_handler());
  // chrome: & friends.
  handler->AddHandlerPair(&HandleWebUI,
                          BrowserURLHandler::null_handler());
}

void ChromeContentBrowserClient::ClearCache(RenderViewHost* rvh) {
  Profile* profile = Profile::FromBrowserContext(
      rvh->site_instance()->GetProcess()->GetBrowserContext());
  BrowsingDataRemover* remover = new BrowsingDataRemover(profile,
      BrowsingDataRemover::EVERYTHING,
      base::Time());
  remover->Remove(BrowsingDataRemover::REMOVE_CACHE);
  // BrowsingDataRemover takes care of deleting itself when done.
}

void ChromeContentBrowserClient::ClearCookies(RenderViewHost* rvh) {
  Profile* profile = Profile::FromBrowserContext(
      rvh->site_instance()->GetProcess()->GetBrowserContext());
  BrowsingDataRemover* remover = new BrowsingDataRemover(profile,
      BrowsingDataRemover::EVERYTHING,
      base::Time());
  int remove_mask = BrowsingDataRemover::REMOVE_SITE_DATA;
  remover->Remove(remove_mask);
  // BrowsingDataRemover takes care of deleting itself when done.
}

FilePath ChromeContentBrowserClient::GetDefaultDownloadDirectory() {
  return download_util::GetDefaultDownloadDirectory();
}

std::string ChromeContentBrowserClient::GetDefaultDownloadName() {
  return l10n_util::GetStringUTF8(IDS_DEFAULT_DOWNLOAD_FILENAME);
}

#if defined(OS_POSIX) && !defined(OS_MACOSX)
int ChromeContentBrowserClient::GetCrashSignalFD(
    const CommandLine& command_line) {
  if (command_line.HasSwitch(switches::kExtensionProcess)) {
    ExtensionCrashHandlerHostLinux* crash_handler =
        ExtensionCrashHandlerHostLinux::GetInstance();
    return crash_handler->GetDeathSignalSocket();
  }

  std::string process_type =
      command_line.GetSwitchValueASCII(switches::kProcessType);

  if (process_type == switches::kRendererProcess)
    return RendererCrashHandlerHostLinux::GetInstance()->GetDeathSignalSocket();

  if (process_type == switches::kPluginProcess)
    return PluginCrashHandlerHostLinux::GetInstance()->GetDeathSignalSocket();

  if (process_type == switches::kPpapiPluginProcess)
    return PpapiCrashHandlerHostLinux::GetInstance()->GetDeathSignalSocket();

  if (process_type == switches::kGpuProcess)
    return GpuCrashHandlerHostLinux::GetInstance()->GetDeathSignalSocket();

  return -1;
}
#endif  // defined(OS_POSIX) && !defined(OS_MACOSX)

#if defined(OS_WIN)
const wchar_t* ChromeContentBrowserClient::GetResourceDllName() {
  return chrome::kBrowserResourcesDll;
}
#endif

#if defined(USE_NSS)
crypto::CryptoModuleBlockingPasswordDelegate*
    ChromeContentBrowserClient::GetCryptoPasswordDelegate(
        const GURL& url) {
  return browser::NewCryptoModuleBlockingDialogDelegate(
      browser::kCryptoModulePasswordKeygen, url.host());
}
#endif

}  // namespace chrome