Implement a method to access the non-composited content root layer picture pile.

cc/thread_proxy.h

Index: cc/thread_proxy.h
diff --git a/cc/thread_proxy.h b/cc/thread_proxy.h
index 5320ee2accd79da56aca971ed7ce3838c101c8d8..2e7f26edd3c7c9efa5e93b57c7f38968a52618a9 100644
--- a/cc/thread_proxy.h
+++ b/cc/thread_proxy.h
@@ -19,6 +19,8 @@ namespace cc {
 
 class InputHandler;
 class LayerTreeHost;
+class PictureLayer;
+class PicturePileImpl;
 class ResourceUpdateQueue;
 class Scheduler;
 class ScopedThreadProxy;
@@ -55,6 +57,7 @@ public:
     virtual void acquireLayerTextures() OVERRIDE;
     virtual void forceSerializeOnSwapBuffers() OVERRIDE;
     virtual bool commitPendingForTesting() OVERRIDE;
+    virtual scoped_refptr<PicturePileImpl> capturePicturePile(const PictureLayer* layer) OVERRIDE;
 
     // LayerTreeHostImplClient implementation
     virtual void didLoseOutputSurfaceOnImplThread() OVERRIDE;
@@ -134,6 +137,7 @@ private:
     void forceSerializeOnSwapBuffersOnImplThread(CompletionEvent*);
     void setNeedsForcedCommitOnImplThread();
     void commitPendingOnImplThreadForTesting(CommitPendingRequest* request);
+    void capturePicturePileOnImplThread(int id, CompletionEvent*, scoped_refptr<PicturePileImpl>*);
 
     // Accessed on main thread only.
     bool m_animateRequested; // Set only when setNeedsAnimate is called.