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

cc/layer_impl.h

Index: cc/layer_impl.h
diff --git a/cc/layer_impl.h b/cc/layer_impl.h
index 4b98f762668e94371f949c02e1b3e1d6d2b8b5e6..b349ad99a77c7c5894ffdb1515fd54906e75a629 100644
--- a/cc/layer_impl.h
+++ b/cc/layer_impl.h
@@ -24,6 +24,7 @@
 #include "third_party/WebKit/Source/Platform/chromium/public/WebFilterOperations.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "third_party/skia/include/core/SkImageFilter.h"
+#include "third_party/skia/include/core/SkPicture.h"
 #include "ui/gfx/rect.h"
 #include "ui/gfx/rect_f.h"
 #include "ui/gfx/transform.h"
@@ -281,6 +282,8 @@ public:
 
     gfx::Rect layerRectToContentRect(const gfx::RectF& layerRect) const;
 
+    virtual skia::RefPtr<SkPicture> getPicture();
+
 protected:
     LayerImpl(LayerTreeImpl* layerImpl, int);