Create a bunch of TabHelpers and TabObservers, move all TCW functionality into them.

BUG=105872
TEST=no change

Review URL: http://codereview.chromium.org/8865004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@113808 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/prefs/browser_prefs.cc b/chrome/browser/prefs/browser_prefs.cc
index e4dc19e..48ea888 100644
--- a/chrome/browser/prefs/browser_prefs.cc
+++ b/chrome/browser/prefs/browser_prefs.cc
@@ -51,10 +51,10 @@
 #include "chrome/browser/tabs/pinned_tab_codec.h"
 #include "chrome/browser/task_manager/task_manager.h"
 #include "chrome/browser/translate/translate_prefs.h"
+#include "chrome/browser/ui/alternate_error_tab_observer.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/prefs/prefs_tab_helper.h"
 #include "chrome/browser/ui/search_engines/keyword_editor_controller.h"
-#include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
 #include "chrome/browser/ui/webui/flags_ui.h"
 #include "chrome/browser/ui/webui/ntp/new_tab_page_handler.h"
 #include "chrome/browser/ui/webui/ntp/new_tab_ui.h"
@@ -157,7 +157,7 @@
   chrome_browser_net::Predictor::RegisterUserPrefs(user_prefs);
   DownloadPrefs::RegisterUserPrefs(user_prefs);
   bookmark_utils::RegisterUserPrefs(user_prefs);
-  TabContentsWrapper::RegisterUserPrefs(user_prefs);
+  AlternateErrorPageTabObserver::RegisterUserPrefs(user_prefs);
   PrefsTabHelper::RegisterUserPrefs(user_prefs);
   TemplateURLPrepopulateData::RegisterUserPrefs(user_prefs);
   ExtensionWebUI::RegisterUserPrefs(user_prefs);