aw: Block child compositor if frame is not consumed by parent

android_webview/browser/hardware_renderer.h

Index: android_webview/browser/hardware_renderer.h
diff --git a/android_webview/browser/hardware_renderer.h b/android_webview/browser/hardware_renderer.h
index 5091491c7523b2a8ba413c7575a017f0b924a160..bc5158a994c55b86f81413ad7a445937fd0742e8 100644
--- a/android_webview/browser/hardware_renderer.h
+++ b/android_webview/browser/hardware_renderer.h
@@ -62,11 +62,15 @@ class HardwareRenderer : public cc::LayerTreeHostClient,
   virtual void UnusedResourcesAreAvailable() OVERRIDE;
 
  private:
+  void SetFrameData();
+
   SharedRendererState* shared_renderer_state_;
 
   typedef void* EGLContext;
   EGLContext last_egl_context_;
 
+  scoped_ptr<DrawGLInput> committed_input_;
+
   // Information about last delegated frame.
   gfx::Size frame_size_;
   gfx::Vector2d scroll_offset_;