cc: Change the activation/ready for draw check from layer to queue.

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..f8521c96e353adb54b369cbeed35d9b0809b2908 100644
--- a/cc/trees/layer_tree_host_impl.h
+++ b/cc/trees/layer_tree_host_impl.h
@@ -241,7 +241,6 @@ class CC_EXPORT LayerTreeHostImpl
   void SetFullRootLayerDamage() override;
 
   // TileManagerClient implementation.
-  const std::vector<PictureLayerImpl*>& GetPictureLayers() const override;
   void NotifyReadyToActivate() override;
   void NotifyReadyToDraw() override;
   void NotifyTileStateChanged(const Tile* tile) override;
@@ -251,6 +250,10 @@ class CC_EXPORT LayerTreeHostImpl
   scoped_ptr<EvictionTilePriorityQueue> BuildEvictionQueue(
       TreePriority tree_priority) override;
 
+  // Returns existing picture layers.
+  // TODO(vmpstr): Remove this, it's only used in tests.
+  const std::vector<PictureLayerImpl*>& GetPictureLayers() const;
+
   // ScrollbarAnimationControllerClient implementation.
   void PostDelayedScrollbarFade(const base::Closure& start_fade,
                                 base::TimeDelta delay) override;