Very basic Android browser-side compositing support.

content/browser/renderer_host/render_view_host_delegate.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_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_DELEGATE_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_DELEGATE_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 29 matching lines @@
 namespace IPC {
 class Message;
 }
 
 namespace gfx {
 class Point;
 class Rect;
 class Size;
 }
 
+namespace WebKit {
+class WebLayer;
+}
+
 namespace content {
 
 class BrowserContext;
 class RenderViewHost;
 class RenderViewHostDelegateView;
 class SessionStorageNamespace;
 class WebContents;
 struct ContextMenuParams;
 struct FileChooserParams;
 struct GlobalRequestID;
@@ skipping 338 matching lines @@
   // provided in the supplied params.
   virtual void ShowContextMenu(const ContextMenuParams& params) {}
 
   // The render view has requested access to media devices listed in
   // |request|, and the client should grant or deny that permission by
   // calling |callback|.
   virtual void RequestMediaAccessPermission(
       const MediaStreamRequest* request,
       const MediaResponseCallback& callback) {}
 
+  virtual void AttachLayer(WebKit::WebLayer& layer) {}

[klobag.chromium, 2012/08/22 07:01:19]

Should we use const WebLayer&?

[no sievers, 2012/08/22 21:17:40]

Unfortunately removeFromParent() is non-const :(

+  virtual void RemoveLayer(WebKit::WebLayer& layer) {}
+
  protected:
   virtual ~RenderViewHostDelegate() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_DELEGATE_H_