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

chrome/browser/chromeos/notifications/balloon_view_host.cc

 // 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.
 
 #include "chrome/browser/chromeos/notifications/balloon_view_host.h"
 
 #include "base/stl_util-inl.h"
 #include "base/values.h"
-#include "chrome/common/render_messages.h"
-#include "chrome/common/render_messages_params.h"
+#include "chrome/common/extensions/extension_messages.h"
 
 namespace chromeos {
 
 BalloonViewHost::~BalloonViewHost() {
   STLDeleteContainerPairSecondPointers(message_callbacks_.begin(),
                                        message_callbacks_.end());
 }
 
 bool BalloonViewHost::AddWebUIMessageCallback(
     const std::string& message,
     MessageCallback* callback) {
   std::pair<MessageCallbackMap::iterator, bool> ret;
   ret = message_callbacks_.insert(std::make_pair(message, callback));
   if (!ret.second)
     delete callback;
   return ret.second;
 }
 
 void BalloonViewHost::ProcessWebUIMessage(
-    const ViewHostMsg_DomMessage_Params& params) {
+    const ExtensionHostMsg_DomMessage_Params& params) {
   ::BalloonViewHost::ProcessWebUIMessage(params);
 
   // Look up the callback for this message.
   MessageCallbackMap::const_iterator callback =
       message_callbacks_.find(params.name);
   if (callback == message_callbacks_.end())
     return;
 
   // Run callback.
   callback->second->Run(&params.arguments);
 }
 
 }  // namespace chromeos