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

chrome/plugin/webplugin_proxy.cc

 // Copyright (c) 2009 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/plugin/webplugin_proxy.h"
 
 #include "build/build_config.h"
 
 #if defined(OS_WIN)
 #include "app/win_util.h"
@@ skipping 651 matching lines @@
   Send(new PluginHostMsg_BindFakePluginWindowHandle(route_id_, opaque));
 }
 
 WebPluginAcceleratedSurface* WebPluginProxy::GetAcceleratedSurface() {
   if (!accelerated_surface_.get())
     accelerated_surface_.reset(new WebPluginAcceleratedSurfaceProxy(this));
   return accelerated_surface_.get();
 }
 
 void WebPluginProxy::AcceleratedFrameBuffersDidSwap(
-    gfx::PluginWindowHandle window) {
-  Send(new PluginHostMsg_AcceleratedSurfaceBuffersSwapped(route_id_, window));
+    gfx::PluginWindowHandle window, uint64 surface_id) {
+  Send(new PluginHostMsg_AcceleratedSurfaceBuffersSwapped(
+        route_id_, window, surface_id));
 }
 
 void WebPluginProxy::SetAcceleratedSurface(
     gfx::PluginWindowHandle window,
     const gfx::Size& size,
     uint64 accelerated_surface_identifier) {
   Send(new PluginHostMsg_AcceleratedSurfaceSetIOSurface(
       route_id_, window, size.width(), size.height(),
       accelerated_surface_identifier));
 }
@@ skipping 33 matching lines @@
   while (index != resource_clients_.end()) {
     WebPluginResourceClient* client = (*index).second;
 
     if (client == resource_client) {
       resource_clients_.erase(index++);
     } else {
       index++;
     }
   }
 }