Make disable_low_res_tiling independent of is_gpu_rasterization_enable

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 4b997fab6b14b562c4b0a7e5b3033f6dc06e05ed..9ce3e4135bd6ee8eb29d8ed667d73347ff813f30 100644
--- a/cc/layers/picture_layer_impl.h
+++ b/cc/layers/picture_layer_impl.h
@@ -123,7 +123,9 @@ class CC_EXPORT PictureLayerImpl
   void RemoveAllTilings();
   void SyncFromActiveLayer(const PictureLayerImpl* other);
   void ManageTilings(bool animating_transform_to_screen);
-  bool ShouldHaveLowResTiling() const { return should_use_low_res_tiling_; }
+  bool ShouldHaveLowResTiling() const {
+    return should_use_low_res_tiling_ && !ShouldUseGpuRasterization();

[vangelis, 2014/03/27 19:16:46]

Bikeshedding a bit but since should_use_low_res_tiling_ is expected to have the
same value as the corresponding tree_impl setting (create_low_res_tiling),
shouldn't these two match for consistency?  Possibly rename it to
should_create_low_res_tiling ?  

+  }
   virtual bool ShouldAdjustRasterScale(
       bool animating_transform_to_screen) const;
   virtual void RecalculateRasterScales(