aura: Allow delegated frames to be used by more than one impl layer.

content/browser/renderer_host/render_widget_host_view_android.h

Index: content/browser/renderer_host/render_widget_host_view_android.h
diff --git a/content/browser/renderer_host/render_widget_host_view_android.h b/content/browser/renderer_host/render_widget_host_view_android.h
index d85c43bc285f35799806ba25e488040821d9be3d..5429e4a219ecc517fae2893f041c1f2dc4494fd8 100644
--- a/content/browser/renderer_host/render_widget_host_view_android.h
+++ b/content/browser/renderer_host/render_widget_host_view_android.h
@@ -14,6 +14,7 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/process/process.h"
+#include "cc/layers/delegated_frame_resource_collection.h"
 #include "cc/layers/delegated_renderer_layer_client.h"
 #include "cc/layers/texture_layer_client.h"
 #include "cc/output/begin_frame_args.h"
@@ -34,6 +35,7 @@ struct GpuHostMsg_AcceleratedSurfacePostSubBuffer_Params;
 
 namespace cc {
 class CopyOutputResult;
+class DelegatedFrameProvider;
 class DelegatedRendererLayer;
 class Layer;
 class SingleReleaseCallback;
@@ -61,6 +63,7 @@ class RenderWidgetHostViewAndroid
       public BrowserAccessibilityDelegate,
       public cc::TextureLayerClient,
       public cc::DelegatedRendererLayerClient,
+      public cc::DelegatedFrameResourceCollectionClient,
       public ImageTransportFactoryAndroidObserver {
  public:
   RenderWidgetHostViewAndroid(RenderWidgetHostImpl* widget,
@@ -195,7 +198,9 @@ class RenderWidgetHostViewAndroid
 
   // cc::DelegatedRendererLayerClient implementation.
   virtual void DidCommitFrameData() OVERRIDE;
-  virtual void UnusedResourcesAreAvailable() OVERRIDE {}
+
+  // cc::DelegatedFrameResourceCollectionClient implementation.
+  virtual void UnusedResourcesAreAvailable() OVERRIDE;
 
   // ImageTransportFactoryAndroidObserver implementation.
   virtual void OnLostResources() OVERRIDE;
@@ -246,6 +251,7 @@ class RenderWidgetHostViewAndroid
 
   void RunAckCallbacks();
 
+  void DestroyDelegatedContent();
   void SwapDelegatedFrame(uint32 output_surface_id,
                           scoped_ptr<cc::DelegatedFrameData> frame_data);
   void SendDelegatedFrameAck(uint32 output_surface_id);
@@ -297,6 +303,8 @@ class RenderWidgetHostViewAndroid
   // The texture layer for this view when using browser-side compositing.
   scoped_refptr<cc::TextureLayer> texture_layer_;
 
+  scoped_refptr<cc::DelegatedFrameResourceCollection> resource_collection_;
+  scoped_refptr<cc::DelegatedFrameProvider> frame_provider_;
   scoped_refptr<cc::DelegatedRendererLayer> delegated_renderer_layer_;
 
   // The layer used for rendering the contents of this view.