Fix race conditions in window snapshot code.

content/browser/renderer_host/render_view_host_impl.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_RENDERER_HOST_RENDER_VIEW_HOST_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_IMPL_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 565 matching lines @@
   void OnDidZoomURL(double zoom_level, bool remember, const GURL& url);
   void OnRequestDesktopNotificationPermission(const GURL& origin,
                                               int callback_id);
   void OnShowDesktopNotification(
       const ShowDesktopNotificationHostMsgParams& params);
   void OnCancelDesktopNotification(int notification_id);
   void OnRunFileChooser(const FileChooserParams& params);
   void OnDidAccessInitialDocument();
   void OnDomOperationResponse(const std::string& json_string,
                               int automation_id);
-  void OnGetWindowSnapshot(const int snapshot_id);
 
 #if defined(OS_MACOSX) || defined(OS_ANDROID)
   void OnShowPopup(const ViewHostMsg_ShowPopup_Params& params);
 #endif
 
   // TODO(nasko): Remove this accessor once RenderFrameHost moves into the frame
   // tree.
   RenderFrameHostImpl* main_render_frame_host() const {
     return main_render_frame_host_.get();
   }
@@ skipping 126 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(RenderViewHostImpl);
 };
 
 #if defined(COMPILER_MSVC)
 #pragma warning(pop)
 #endif
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_IMPL_H_