Fix race conditions in window snapshot code.

content/renderer/render_view_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_RENDERER_RENDER_VIEW_IMPL_H_
 #define CONTENT_RENDERER_RENDER_VIEW_IMPL_H_
 
 #include <deque>
 #include <map>
 #include <set>
@@ skipping 1141 matching lines @@
   void SendUpdateFaviconURL(const std::vector<FaviconURL>& urls);
 
   // Invoked from DidStopLoading(). Sends the current list of loaded favicons to
   // the browser.
   void DidStopLoadingIcons();
 
   // Coordinate conversion -----------------------------------------------------
 
   gfx::RectF ClientRectToPhysicalWindowRect(const gfx::RectF& rect) const;
 
+  // Helper for LatencyInfo construction.
+  int64 GetLatencyComponentId();
+
   // ---------------------------------------------------------------------------
   // ADDING NEW FUNCTIONS? Please keep private functions alphabetized and put
   // it in the same order in the .cc file as it was in the header.
   // ---------------------------------------------------------------------------
 
   // Settings ------------------------------------------------------------------
 
   WebPreferences webkit_preferences_;
   RendererPreferences renderer_preferences_;
 
@@ skipping 357 matching lines @@
   // use the Observer interface to filter IPC messages and receive frame change
   // notifications.
   // ---------------------------------------------------------------------------
 
   DISALLOW_COPY_AND_ASSIGN(RenderViewImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_VIEW_IMPL_H_