Add an location bar icon and a content settings bubble for media settings.

chrome/browser/content_settings/tab_specific_content_settings.h

Index: chrome/browser/content_settings/tab_specific_content_settings.h
diff --git a/chrome/browser/content_settings/tab_specific_content_settings.h b/chrome/browser/content_settings/tab_specific_content_settings.h
index 3ba7f4fb2afad868899bb4dc3932facc6683346b..fee681f859bae3c7f4dcded9a130ddaa97b7d346 100644
--- a/chrome/browser/content_settings/tab_specific_content_settings.h
+++ b/chrome/browser/content_settings/tab_specific_content_settings.h
@@ -191,7 +191,6 @@ class TabSpecificContentSettings
     pending_protocol_handler_ = ProtocolHandler::EmptyProtocolHandler();
   }
 
-
   // Sets the previous protocol handler which will be replaced by the
   // pending protocol handler.
   void set_previous_protocol_handler(const ProtocolHandler& handler) {
@@ -278,6 +277,9 @@ class TabSpecificContentSettings
   void OnGeolocationPermissionSet(const GURL& requesting_frame,
                                   bool allowed);
 
+  // This method is called when a media stream is accessed.
+  void OnMediaStreamAccessed();
+
   // Adds the given |SiteDataObserver|. The |observer| is notified when a
   // locale shared object, like for example a cookie, is accessed.
   void AddSiteDataObserver(SiteDataObserver* observer);