cc: Refactor additional code from BuildRasterQueue.

cc/trees/layer_tree_host_impl.h

Index: cc/trees/layer_tree_host_impl.h
diff --git a/cc/trees/layer_tree_host_impl.h b/cc/trees/layer_tree_host_impl.h
index 0765bb7a818e204ef1e9bbfe6a504cc9a54b8f1c..69bde8bd2eac8cedc4d785d5381c56619a1b2958 100644
--- a/cc/trees/layer_tree_host_impl.h
+++ b/cc/trees/layer_tree_host_impl.h
@@ -250,6 +250,7 @@ class CC_EXPORT LayerTreeHostImpl
       RasterTilePriorityQueue::Type type) override;
   scoped_ptr<EvictionTilePriorityQueue> BuildEvictionQueue(
       TreePriority tree_priority) override;
+  void SetIsLikelyToRequireADraw(bool is_likely_to_require_a_draw) override;
 
   // ScrollbarAnimationControllerClient implementation.
   void PostDelayedScrollbarFade(const base::Closure& start_fade,
@@ -725,7 +726,7 @@ class CC_EXPORT LayerTreeHostImpl
   std::vector<PictureLayerImpl::Pair> picture_layer_pairs_;
 
   bool requires_high_res_to_draw_;
-  bool required_for_draw_tile_is_top_of_raster_queue_;
+  bool is_likely_to_require_a_draw_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerTreeHostImpl);
 };