cc : Delete ResetFlags in property trees

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 6007a538965da047679dc3575dda029772561411..2aab157ea519d07e95c28661afd6c3d12e092145 100644
--- a/cc/trees/property_tree.h
+++ b/cc/trees/property_tree.h
@@ -698,7 +698,6 @@ class CC_EXPORT PropertyTrees final {
   int sequence_number;
   bool is_main_thread;
   bool is_active;
-  enum ResetFlags { EFFECT_TREE, TRANSFORM_TREE, ALL_TREES };
 
   void SetInnerViewportContainerBoundsDelta(gfx::Vector2dF bounds_delta);
   void SetOuterViewportContainerBoundsDelta(gfx::Vector2dF bounds_delta);
@@ -706,7 +705,7 @@ class CC_EXPORT PropertyTrees final {
   void PushOpacityIfNeeded(PropertyTrees* target_tree);
   void UpdateChangeTracking();
   void PushChangeTrackingTo(PropertyTrees* tree);
-  void ResetAllChangeTracking(ResetFlags flag);
+  void ResetAllChangeTracking();
 
   gfx::Vector2dF inner_viewport_container_bounds_delta() const {
     return inner_viewport_container_bounds_delta_;