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

cc/test/fake_proxy.h

Index: cc/test/fake_proxy.h
diff --git a/cc/test/fake_proxy.h b/cc/test/fake_proxy.h
index ba0014f4d0bd3969c065f67c5e1962e4befa9735..e066ec56f6c25e12e35a8afb8be153601e0cbf39 100644
--- a/cc/test/fake_proxy.h
+++ b/cc/test/fake_proxy.h
@@ -5,6 +5,7 @@
 #ifndef CC_TEST_FAKE_PROXY_H_
 #define CC_TEST_FAKE_PROXY_H_
 
+#include "base/memory/ref_counted.h"
 #include "cc/layer_tree_host.h"
 #include "cc/proxy.h"
 #include "cc/thread.h"
@@ -39,6 +40,7 @@ public:
     virtual void acquireLayerTextures() OVERRIDE { }
     virtual void loseOutputSurface() OVERRIDE { }
     virtual bool commitPendingForTesting() OVERRIDE;
+    virtual scoped_refptr<PicturePileImpl> capturePicturePile() OVERRIDE;
 
     virtual RendererCapabilities& rendererCapabilities();
     void setMaxPartialTextureUpdates(size_t);