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

chrome/renderer/render_view.h

Index: chrome/renderer/render_view.h
diff --git a/chrome/renderer/render_view.h b/chrome/renderer/render_view.h
index fddfb13d4eeb11669ff6db680f54438880a14884..a39aa63b9c9a640bdcfd1b70197693a793b4b41d 100644
--- a/chrome/renderer/render_view.h
+++ b/chrome/renderer/render_view.h
@@ -332,7 +332,8 @@ class RenderView : public RenderWidget,
                                          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);