Very basic Android browser-side compositing support.

content/public/browser/web_contents_delegate.h

Index: content/public/browser/web_contents_delegate.h
diff --git a/content/public/browser/web_contents_delegate.h b/content/public/browser/web_contents_delegate.h
index ac817cceffd19474ebdf33b78f9d9c866287affe..314ba91c6ea9e291dda5c68214fc16246e6889cf 100644
--- a/content/public/browser/web_contents_delegate.h
+++ b/content/public/browser/web_contents_delegate.h
@@ -57,6 +57,12 @@ struct WebIntentData;
 struct WebIntentServiceData;
 }
 
+#if defined(OS_ANDROID)
+namespace WebKit {
+class WebLayer;
+}
+#endif
+
 namespace content {
 
 struct OpenURLParams;
@@ -422,6 +428,10 @@ class CONTENT_EXPORT WebContentsDelegate {
       const MediaStreamRequest* request,
       const MediaResponseCallback& callback) {}
 
+  virtual void AttachLayer(WebContents* web_contents,
+                           WebKit::WebLayer& layer) {}

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

const WebLayer&?

+  virtual void RemoveLayer(WebContents* web_contents,
+                           WebKit::WebLayer& layer) {}
  protected:
   virtual ~WebContentsDelegate();