Let every "accelerated IO surface swapped" message have an identifier of the surface.

chrome/renderer/render_view.h

 // Copyright (c) 2010 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_RENDERER_RENDER_VIEW_H_
 #define CHROME_RENDERER_RENDER_VIEW_H_
 #pragma once
 
 #include <deque>
 #include <map>
@@ skipping 314 matching lines @@
   void AcceleratedSurfaceSetIOSurface(gfx::PluginWindowHandle window,
                                       int32 width,
                                       int32 height,
                                       uint64 io_surface_identifier);
   TransportDIB::Handle AcceleratedSurfaceAllocTransportDIB(size_t size);
   void AcceleratedSurfaceFreeTransportDIB(TransportDIB::Id dib_id);
   void AcceleratedSurfaceSetTransportDIB(gfx::PluginWindowHandle window,
                                          int32 width,
                                          int32 height,
                                          TransportDIB::Handle transport_dib);
-  void AcceleratedSurfaceBuffersSwapped(gfx::PluginWindowHandle window);
+  void AcceleratedSurfaceBuffersSwapped(gfx::PluginWindowHandle window,
+                                        uint64 surface_id);
 #endif
 
   void RegisterPluginDelegate(WebPluginDelegateProxy* delegate);
   void UnregisterPluginDelegate(WebPluginDelegateProxy* delegate);
 
   // IPC::Channel::Listener implementation -------------------------------------
 
   virtual void OnMessageReceived(const IPC::Message& msg);
 
   // WebKit::WebWidgetClient implementation ------------------------------------
@@ skipping 1055 matching lines @@
   // ADDING NEW DATA? Please see if it fits appropriately in one of the above
   // sections rather than throwing it randomly at the end. If you're adding a
   // bunch of stuff, you should probably create a helper class and put your
   // data and methods on that to avoid bloating RenderView more.
   // ---------------------------------------------------------------------------
 
   DISALLOW_COPY_AND_ASSIGN(RenderView);
 };
 
 #endif  // CHROME_RENDERER_RENDER_VIEW_H_