Add a GPU rasterization hint to cc::PictureLayer

cc/layers/picture_layer.h

Index: cc/layers/picture_layer.h
diff --git a/cc/layers/picture_layer.h b/cc/layers/picture_layer.h
index 853f449c0ad988a4364c2cb322f439c04bc0e0e2..78bb8f44644fa59aa0902207e8a9067792c3b14f 100644
--- a/cc/layers/picture_layer.h
+++ b/cc/layers/picture_layer.h
@@ -40,6 +40,8 @@ class CC_EXPORT PictureLayer : public Layer {
 
   ContentLayerClient* client() { return client_; }
 
+  void SetHasGpuRasterizationHint(bool has_hint);
+
  protected:
   explicit PictureLayer(ContentLayerClient* client);
   virtual ~PictureLayer();
@@ -55,6 +57,7 @@ class CC_EXPORT PictureLayer : public Layer {
   Region pile_invalidation_;
   gfx::Rect last_updated_visible_content_rect_;
   bool is_mask_;
+  bool has_gpu_rasterization_hint_;
 
   int update_source_frame_number_;