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

chrome/browser/gpu_process_host.cc

 // 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.
 
 #include "chrome/browser/gpu_process_host.h"
 
 #include "app/app_switches.h"
 #include "base/command_line.h"
 #include "base/thread.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 290 matching lines @@
   BrowserThread::PostTask(
       BrowserThread::UI, FROM_HERE,
       new SetIOSurfaceDispatcher(params));
 }
 
 namespace {
 
 class BuffersSwappedDispatcher : public Task {
  public:
   BuffersSwappedDispatcher(
-      int32 renderer_id, int32 render_view_id, gfx::PluginWindowHandle window)
+      int32 renderer_id,
+      int32 render_view_id,
+      gfx::PluginWindowHandle window,
+      uint64 surface_id)
       : renderer_id_(renderer_id),
         render_view_id_(render_view_id),
-        window_(window) {
+        window_(window),
+        surface_id_(surface_id) {
   }
 
   void Run() {
     RenderViewHost* host = RenderViewHost::FromID(renderer_id_,
                                                   render_view_id_);
     if (!host)
       return;
     RenderWidgetHostView* view = host->view();
     if (!view)
       return;
-    view->AcceleratedSurfaceBuffersSwapped(window_);
+    view->AcceleratedSurfaceBuffersSwapped(window_, surface_id_);
   }
 
  private:
   int32 renderer_id_;
   int32 render_view_id_;
   gfx::PluginWindowHandle window_;
+  uint64 surface_id_;
 
   DISALLOW_COPY_AND_ASSIGN(BuffersSwappedDispatcher);
 };
 
 }  // namespace
 
 void GpuProcessHost::OnAcceleratedSurfaceBuffersSwapped(
     int32 renderer_id,
     int32 render_view_id,
-    gfx::PluginWindowHandle window) {
+    gfx::PluginWindowHandle window,
+    uint64 surface_id) {
   BrowserThread::PostTask(
       BrowserThread::UI, FROM_HERE,
-      new BuffersSwappedDispatcher(renderer_id, render_view_id, window));
+      new BuffersSwappedDispatcher(
+          renderer_id, render_view_id, window, surface_id));
 }
 #endif
 
 void GpuProcessHost::ReplyToRenderer(
     const IPC::ChannelHandle& channel,
     const GPUInfo& gpu_info,
     ResourceMessageFilter* filter) {
   ViewMsg_GpuChannelEstablished* message =
       new ViewMsg_GpuChannelEstablished(channel, gpu_info);
   // If the renderer process is performing synchronous initialization,
   // it needs to handle this message before receiving the reply for
   // the synchronous ViewHostMsg_SynchronizeGpu message.
   message->set_unblock(true);
   filter->Send(message);
 }
 
 URLRequestContext* GpuProcessHost::GetRequestContext(
     uint32 request_id,
     const ViewHostMsg_Resource_Request& request_data) {
   return NULL;
 }
 
 bool GpuProcessHost::CanShutdown() {
   return true;
 }