cc: Trigger GPU rasterization based on a per-layer hint

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..64255323591faa4cf056686cafcb9ab359ce4b60 100644
--- a/cc/layers/picture_layer.h
+++ b/cc/layers/picture_layer.h
@@ -33,6 +33,7 @@ class CC_EXPORT PictureLayer : public Layer {
   virtual bool Update(ResourceUpdateQueue* queue,
                       const OcclusionTracker<Layer>* occlusion) OVERRIDE;
   virtual void SetIsMask(bool is_mask) OVERRIDE;
+  virtual void SetHasGpuRasterizationHint(bool has_hint) OVERRIDE;
   virtual bool SupportsLCDText() const OVERRIDE;
   virtual skia::RefPtr<SkPicture> GetPicture() const OVERRIDE;
 
@@ -55,6 +56,7 @@ 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_;