Refactor MutatorHostClient from LayerTreeHost to LayerTree.

cc/trees/draw_property_utils.h

Index: cc/trees/draw_property_utils.h
diff --git a/cc/trees/draw_property_utils.h b/cc/trees/draw_property_utils.h
index 436d0bbade08d73f78bd2900434978272e40ac6d..3732f435a90100ccca844dc56dde998fbdebbfff 100644
--- a/cc/trees/draw_property_utils.h
+++ b/cc/trees/draw_property_utils.h
@@ -20,6 +20,7 @@ class ClipTree;
 struct DrawProperties;
 class Layer;
 class LayerImpl;
+class LayerTree;
 class LayerTreeHost;
 class RenderSurfaceImpl;
 class EffectTree;
@@ -65,7 +66,7 @@ void CC_EXPORT BuildPropertyTreesAndComputeVisibleRects(
 void CC_EXPORT UpdatePropertyTrees(PropertyTrees* property_trees,
                                    bool can_render_to_separate_surface);
 
-void CC_EXPORT FindLayersThatNeedUpdates(LayerTreeHost* layer_tree_host,
+void CC_EXPORT FindLayersThatNeedUpdates(LayerTree* layer_tree,
                                          const TransformTree& transform_tree,
                                          const EffectTree& effect_tree,
                                          LayerList* update_layer_list);