Very basic Android browser-side compositing support.

content/browser/renderer_host/render_view_host_delegate.h

Index: content/browser/renderer_host/render_view_host_delegate.h
diff --git a/content/browser/renderer_host/render_view_host_delegate.h b/content/browser/renderer_host/render_view_host_delegate.h
index c14fc788b49a437a435971a4504d55e7281c1f49..414d1cb0a41be8161a5c57f17bf7fb24e10bdd34 100644
--- a/content/browser/renderer_host/render_view_host_delegate.h
+++ b/content/browser/renderer_host/render_view_host_delegate.h
@@ -47,6 +47,12 @@ class Rect;
 class Size;
 }
 
+#if defined(OS_ANDROID)

[jam, 2012/09/04 16:44:48]

nit: since this class exists on all platforms, get rid of the ifdef here to make
the code easier on the eyes

+namespace WebKit {
+class WebLayer;
+}
+#endif
+
 namespace content {
 
 class BrowserContext;
@@ -409,6 +415,11 @@ class CONTENT_EXPORT RenderViewHostDelegate {
       const MediaStreamRequest* request,
       const MediaResponseCallback& callback) {}
 
+#if defined(OS_ANDROID)
+  virtual void AttachLayer(WebKit::WebLayer* layer) {}
+  virtual void RemoveLayer(WebKit::WebLayer* layer) {}
+#endif
+
  protected:
   virtual ~RenderViewHostDelegate() {}
 };