Add enableReferrers and enableHyperlinkAuditing to contentSettings.misc API.

content/browser/tab_contents/tab_contents.cc

Index: content/browser/tab_contents/tab_contents.cc
diff --git a/content/browser/tab_contents/tab_contents.cc b/content/browser/tab_contents/tab_contents.cc
index 7a1e82b9985e6deb4799830d1b6f2867909015ca..c0e0469865000818ece347d3c15e561aaeb78ef8 100644
--- a/content/browser/tab_contents/tab_contents.cc
+++ b/content/browser/tab_contents/tab_contents.cc
@@ -159,7 +159,8 @@ const char* kPrefsToObserve[] = {
   prefs::kWebKitMinimumFontSize,
   prefs::kWebKitMinimumLogicalFontSize,
   prefs::kWebkitTabsToLinks,
-  prefs::kDefaultCharset
+  prefs::kDefaultCharset,
+  prefs::kEnableReferrers
 };
 
 const int kPrefsToObserveLength = arraysize(kPrefsToObserve);
@@ -2441,6 +2442,10 @@ void TabContents::Observe(NotificationType type,
         UpdateWebPreferences();
       } else if (*pref_name_in == prefs::kDefaultZoomLevel) {
         UpdateZoomLevel();
+      } else if (*pref_name_in == prefs::kEnableReferrers) {
+        renderer_preferences_util::UpdateFromSystemSettings(
+            &renderer_preferences_, profile());
+        render_view_host()->SyncRendererPrefs();
       } else {
         NOTREACHED() << "unexpected pref change notification" << *pref_name_in;
       }