Allow extensions on chrome:// URLs, when flag is set and permission is explicitly requested in the manifest.

BUG=174183

Review URL: https://chromiumcodereview.appspot.com/12792005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@189586 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index bfdc119..f18489f 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -467,6 +467,13 @@
     SINGLE_VALUE_TYPE(switches::kEnableExperimentalExtensionApis)
   },
   {
+    "extensions-on-chrome-urls",
+    IDS_FLAGS_EXTENSIONS_ON_CHROME_URLS_NAME,
+    IDS_FLAGS_EXTENSIONS_ON_CHROME_URLS_DESCRIPTION,
+    kOsAll,
+    SINGLE_VALUE_TYPE(switches::kExtensionsOnChromeURLs)
+  },
+  {
     "action-box",
     IDS_FLAGS_ACTION_BOX_NAME,
     IDS_FLAGS_ACTION_BOX_DESCRIPTION,