Introduce intercepting and handling devtools messages in the renderer.

content/browser/devtools/render_view_devtools_agent_host.h

 // Copyright (c) 2012 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 CONTENT_BROWSER_DEVTOOLS_RENDER_VIEW_DEVTOOLS_AGENT_HOST_H_
 #define CONTENT_BROWSER_DEVTOOLS_RENDER_VIEW_DEVTOOLS_AGENT_HOST_H_
 
 #include <map>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/browser/devtools/devtools_agent_host_impl.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/render_view_host_observer.h"
 #include "content/public/browser/web_contents_observer.h"
 
 namespace content {
 
 class DevToolsAgentHostRvhObserver;
+class RendererOverridesHandler;
 class RenderViewHost;
 
 class CONTENT_EXPORT RenderViewDevToolsAgentHost
     : public DevToolsAgentHostImpl,
       private WebContentsObserver {
  public:
   static void OnCancelPendingNavigation(RenderViewHost* pending,
                                         RenderViewHost* current);
 
   RenderViewDevToolsAgentHost(RenderViewHost*);
 
   RenderViewHost* render_view_host() { return render_view_host_; }
 
  private:
   friend class DevToolsAgentHost;
   friend class DevToolsAgentHostRvhObserver;
 
   virtual ~RenderViewDevToolsAgentHost();
 
   // DevTooolsAgentHost overrides.
   virtual RenderViewHost* GetRenderViewHost() OVERRIDE;
 
   // DevToolsAgentHostImpl overrides.
   virtual void DispatchOnInspectorBackend(const std::string& message) OVERRIDE;
-
-  // DevToolsAgentHostImpl implementation.
   virtual void SendMessageToAgent(IPC::Message* msg) OVERRIDE;
   virtual void NotifyClientAttaching() OVERRIDE;
   virtual void NotifyClientDetaching() OVERRIDE;
 
   // WebContentsObserver overrides.
   virtual void AboutToNavigateRenderView(RenderViewHost* dest_rvh) OVERRIDE;
 
   void ConnectRenderViewHost(RenderViewHost* rvh, bool reattach);
   void DisconnectRenderViewHost();
 
   void RenderViewHostDestroyed(RenderViewHost* rvh);
   bool OnRvhMessageReceived(const IPC::Message& message);
 
   void OnDispatchOnInspectorFrontend(const std::string& message);
   void OnSaveAgentRuntimeState(const std::string& state);
   void OnClearBrowserCache();
   void OnClearBrowserCookies();
 
   bool CaptureScreenshot(std::string* base_64_data);
 
   bool HandleJavaScriptDialog(bool accept);
 
   RenderViewHost* render_view_host_;
   scoped_ptr<DevToolsAgentHostRvhObserver> rvh_observer_;
+  scoped_ptr<RendererOverridesHandler> overrides_handler_;
   std::string state_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderViewDevToolsAgentHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DEVTOOLS_RENDER_VIEW_DEVTOOLS_AGENT_HOST_H_