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

chrome/browser/extensions/extension_web_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_EXTENSIONS_EXTENSION_WEB_UI_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_WEB_UI_H_
 #pragma once
 
 #include <string>
 
 #include "base/scoped_ptr.h"
 #include "chrome/browser/extensions/extension_bookmark_manager_api.h"
 #include "chrome/browser/extensions/extension_function_dispatcher.h"
 #include "chrome/browser/favicon_service.h"
 #include "chrome/common/extensions/extension.h"
 #include "content/browser/webui/web_ui.h"
 
 class GURL;
 class ListValue;
 class PrefService;
 class Profile;
 class RenderViewHost;
 class TabContents;
-struct ViewHostMsg_DomMessage_Params;
+struct ExtensionHostMsg_DomMessage_Params;
 
 // This class implements WebUI for extensions and allows extensions to put UI in
 // the main tab contents area. For example, each extension can specify an
 // "options_page", and that page is displayed in the tab contents area and is
 // hosted by this class.
 class ExtensionWebUI
     : public WebUI,
       public ExtensionFunctionDispatcher::Delegate {
  public:
   static const char kExtensionURLOverrides[];
 
   explicit ExtensionWebUI(TabContents* tab_contents, const GURL& url);
 
   virtual ~ExtensionWebUI();
 
   ExtensionFunctionDispatcher* extension_function_dispatcher() const {
     return extension_function_dispatcher_.get();
   }
 
   // WebUI
   virtual void RenderViewCreated(RenderViewHost* render_view_host);
   virtual void RenderViewReused(RenderViewHost* render_view_host);
-  virtual void ProcessWebUIMessage(const ViewHostMsg_DomMessage_Params& params);
+  virtual void ProcessWebUIMessage(
+      const ExtensionHostMsg_DomMessage_Params& params);
 
   // ExtensionFunctionDispatcher::Delegate
   virtual Browser* GetBrowser();
   virtual gfx::NativeView GetNativeViewOfHost();
   virtual gfx::NativeWindow GetCustomFrameNativeWindow();
   virtual TabContents* associated_tab_contents() const;
 
   virtual ExtensionBookmarkManagerEventRouter*
       extension_bookmark_manager_event_router();
 
@@ skipping 39 matching lines @@
   // TODO(aa): This seems out of place. Why is it not with the event routers for
   // the other extension APIs?
   scoped_ptr<ExtensionBookmarkManagerEventRouter>
       extension_bookmark_manager_event_router_;
 
   // The URL this WebUI was created for.
   GURL url_;
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_WEB_UI_H_