[BrowserTag] Send dib info with NavigateGuest message,

content/renderer/browser_plugin/mock_browser_plugin.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_RENDERER_BROWSER_PLUGIN_MOCK_BROWSER_PLUGIN_H_
 #define CONTENT_RENDERER_BROWSER_PLUGIN_MOCK_BROWSER_PLUGIN_H_
 
 #include "content/renderer/browser_plugin/browser_plugin.h"
 
 namespace content {
 
 class MockBrowserPlugin : public BrowserPlugin {
  public:
   MockBrowserPlugin(
       int id,
       RenderViewImpl* render_view,
       WebKit::WebFrame* frame,
       const WebKit::WebPluginParams& params);
 
   virtual ~MockBrowserPlugin();
 
+  virtual TransportDIB* CreateTransportDIB(const size_t size) OVERRIDE;
+  virtual void FreeDamageBuffer() OVERRIDE;
+
   // Allow poking at a few private members.
   using BrowserPlugin::guest_crashed_;
   using BrowserPlugin::resize_pending_;
+
+ private:
+  int transport_dib_next_sequence_number_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_BROWSER_PLUGIN_MOCK_BROWSER_PLUGIN_H_