cc : Add LayerToPropertyTreeIndices map to PropertyTrees

cc/trees/property_tree.h

Index: cc/trees/property_tree.h
diff --git a/cc/trees/property_tree.h b/cc/trees/property_tree.h
index 002bea1a37cd96105e6b5805d7c8bd326fe1f12f..d98cb48b4f72895adaa894278438453d42dbfb76 100644
--- a/cc/trees/property_tree.h
+++ b/cc/trees/property_tree.h
@@ -685,14 +685,20 @@ class CC_EXPORT PropertyTrees final {
   int sequence_number;
   bool is_main_thread;
   bool is_active;
-  enum ResetFlags { EFFECT_TREE, TRANSFORM_TREE, ALL_TREES };
+  enum Types {
+    EFFECT_TREE,
+    TRANSFORM_TREE,
+    CLIP_TREE,
+    SCROLL_TREE,
+    EFFECT_AND_TRANSFORM_TREES
+  };
 
   void SetInnerViewportContainerBoundsDelta(gfx::Vector2dF bounds_delta);
   void SetOuterViewportContainerBoundsDelta(gfx::Vector2dF bounds_delta);
   void SetInnerViewportScrollBoundsDelta(gfx::Vector2dF bounds_delta);
   void UpdateChangeTracking();
   void PushChangeTrackingTo(PropertyTrees* tree);
-  void ResetAllChangeTracking(ResetFlags flag);
+  void ResetAllChangeTracking(Types type);
 
   gfx::Vector2dF inner_viewport_container_bounds_delta() const {
     return inner_viewport_container_bounds_delta_;