Move extension messages to their own file and add a RenderViewObserver to start moving the extens...

chrome/browser/ui/webui/sync_internals_ui.h

 // Copyright (c) 2011 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.
 
 #ifndef CHROME_BROWSER_UI_WEBUI_SYNC_INTERNALS_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_SYNC_INTERNALS_UI_H_
 #pragma once
 
 #include <string>
 
@@ skipping 18 matching lines @@
   // getAboutInfo():
   //   Immediately fires a onGetAboutInfoFinished() event with a
   //   dictionary of sync-related stats and info.
   //
   // All other messages are routed to the sync service if it exists,
   // and dropped otherwise.
   //
   // TODO(akalin): Add a simple isSyncEnabled() message and make
   // getAboutInfo() be handled by the sync service.
   virtual void ProcessWebUIMessage(
-      const ViewHostMsg_DomMessage_Params& params);
+      const ExtensionHostMsg_DomMessage_Params& params);
 
   // browser_sync::JsEventHandler implementation.
   virtual void HandleJsEvent(const std::string& name,
                              const browser_sync::JsArgList& args);
 
  private:
   // Returns the sync service's JsFrontend object, or NULL if the sync
   // service does not exist.
   browser_sync::JsFrontend* GetJsFrontend();
 
   DISALLOW_COPY_AND_ASSIGN(SyncInternalsUI);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_SYNC_INTERNALS_UI_H_