Render Core Animation plugins through WebKit's compositor rather than

webkit/plugins/npapi/webplugin_accelerated_surface_mac.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 WEBKIT_PLUGINS_NPAPI_WEBPLUGIN_ACCELERATED_SURFACE_MAC_H_
 #define WEBKIT_PLUGINS_NPAPI_WEBPLUGIN_ACCELERATED_SURFACE_MAC_H_
 #pragma once
 
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/size.h"
 
 // Avoid having to include OpenGL headers here.
 typedef struct _CGLContextObject* CGLContextObj;
 
 namespace webkit {
 namespace npapi {
 
 // Interface class for interacting with an accelerated plugin surface, used
 // for the Core Animation flavors of plugin drawing on the Mac.
 class WebPluginAcceleratedSurface {
  public:
   virtual ~WebPluginAcceleratedSurface() {}
 
   // Sets the window handle used throughout the browser to identify this
   // surface.
   virtual void SetWindowHandle(gfx::PluginWindowHandle window) = 0;
 
+  // Indicates whether the new code path which renders the plugins via
+  // the compositor should be used.
+  virtual bool IsComposited() = 0;
+
   // Sets the size of the surface.
   virtual void SetSize(const gfx::Size& size) = 0;
 
   // Returns the context used to draw into this surface.
   // If initializing the surface failed, this will be NULL.
   virtual CGLContextObj context() = 0;
 
   // Readies the surface for drawing. Must be called before any drawing session.
   virtual void StartDrawing() = 0;
 
   // Ends a drawing session. Changes to the surface may not be reflected until
   // this is called.
   virtual void EndDrawing() = 0;
 };
 
 }  // namespace npapi
 }  // namespace webkit
 
 #endif  // WEBKIT_PLUGINS_NPAPI_WEBPLUGIN_ACCELERATED_SURFACE_MAC_H_