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

chrome/browser/chromeos/notifications/balloon_view_host.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_CHROMEOS_NOTIFICATIONS_BALLOON_VIEW_HOST_H_
 #define CHROME_BROWSER_CHROMEOS_NOTIFICATIONS_BALLOON_VIEW_HOST_H_
 #pragma once
 
 #include "chrome/browser/ui/views/notifications/balloon_view_host.h"
 
@@ skipping 16 matching lines @@
   virtual ~BalloonViewHost();
 
   // Adds a callback for WebUI message. Returns true if the callback
   // is succssfully registered, or false otherwise. It fails to add if
   // a callback for given message already exists. The callback object
   // is owned and deleted by callee.
   bool AddWebUIMessageCallback(const std::string& message,
                                MessageCallback* callback);
 
   // Process WebUI message.
-  virtual void ProcessWebUIMessage(const ViewHostMsg_DomMessage_Params& params);
+  virtual void ProcessWebUIMessage(
+      const ExtensionHostMsg_DomMessage_Params& params);
 
  private:
   // A map of message name -> message handling callback.
   typedef std::map<std::string, MessageCallback*> MessageCallbackMap;
   MessageCallbackMap message_callbacks_;
 
   DISALLOW_COPY_AND_ASSIGN(BalloonViewHost);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_NOTIFICATIONS_BALLOON_VIEW_HOST_H_