Very basic Android browser-side compositing support.

content/browser/android/graphics_context.h

 // Copyright (c) 2012 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 CONTENT_PUBLIC_BROWSER_ANDROID_GRAPHICS_CONTEXT_H_
-#define CONTENT_PUBLIC_BROWSER_ANDROID_GRAPHICS_CONTEXT_H_
+#ifndef CONTENT_BROWSER_ANDROID_GRAPHICS_CONTEXT_H_
+#define CONTENT_BROWSER_ANDROID_GRAPHICS_CONTEXT_H_
 
 #include "ui/gfx/native_widget_types.h"
 
 struct ANativeWindow;
 
 namespace WebKit {
 class WebGraphicsContext3D;
 }
 
 namespace content {
 
 class GraphicsContext {
  public:
   virtual ~GraphicsContext() { }
 
-  // Create a UI graphics context that renders to the given surface.
+  // Create and returns a graphics context on the caller's thread and
+  // also creates an image transport surface associated with the given
+  // parent window.
   static GraphicsContext* CreateForUI(ANativeWindow* ui_window);
 
-  virtual WebKit::WebGraphicsContext3D* GetContext3D() = 0;
   virtual uint32 InsertSyncPoint() = 0;
+  virtual int GetSurfaceID() = 0;
 };
 
 }  // namespace content
 
-#endif  // CONTENT_PUBLIC_BROWSER_ANDROID_GRAPHICS_CONTEXT_H_
+#endif  // CONTENT_BROWSER_ANDROID_GRAPHICS_CONTEXT_H_