cc: Let skia veto gpu rasterization.

cc/layers/picture_layer_impl.h

Index: cc/layers/picture_layer_impl.h
diff --git a/cc/layers/picture_layer_impl.h b/cc/layers/picture_layer_impl.h
index 9ce3e4135bd6ee8eb29d8ed667d73347ff813f30..701687b32b40526345f1cc6f76d3eb4287d133de 100644
--- a/cc/layers/picture_layer_impl.h
+++ b/cc/layers/picture_layer_impl.h
@@ -105,8 +105,8 @@ class CC_EXPORT PictureLayerImpl
 
   virtual void RunMicroBenchmark(MicroBenchmarkImpl* benchmark) OVERRIDE;
 
-  void SetHasGpuRasterizationHint(bool has_hint);
-  bool ShouldUseGpuRasterization() const;
+  void SetUseGpuRasterization(bool use_gpu);
+  bool ShouldUseGpuRasterization() const { return use_gpu_rasterization_; }
 
   // Functions used by tile manager.
   void DidUnregisterLayer();
@@ -183,8 +183,8 @@ class CC_EXPORT PictureLayerImpl
   // A sanity state check to make sure UpdateTilePriorities only gets called
   // after a CalculateContentsScale/ManageTilings.
   bool should_update_tile_priorities_;
-  bool has_gpu_rasterization_hint_;
   bool should_use_low_res_tiling_;
+  bool use_gpu_rasterization_;
 
   bool layer_needs_to_register_itself_;