[NOT FOR REVIEW]

cc/trees/layer_tree_impl.h

Index: cc/trees/layer_tree_impl.h
diff --git a/cc/trees/layer_tree_impl.h b/cc/trees/layer_tree_impl.h
index ad4edc336f255eb25e0bd33e4d4b366c04704f95..17b74d91b11c8da67d726811564ec0ccb3a8e55a 100644
--- a/cc/trees/layer_tree_impl.h
+++ b/cc/trees/layer_tree_impl.h
@@ -129,8 +129,14 @@ class CC_EXPORT LayerTreeImpl {
   bool IsRootLayer(const LayerImpl* layer) const;
   std::unique_ptr<OwnedLayerImplList> DetachLayers();
 
-  void SetPropertyTrees(PropertyTrees* property_trees);
+  void SetPropertyTrees(PropertyTrees* property_trees,
+      PropertyTrees* test_property_trees_with_new_clip_tree);
   PropertyTrees* property_trees() { return &property_trees_; }
+  PropertyTrees* test_property_trees_with_new_clip_tree() {
+    if (!test_property_trees_with_new_clip_tree_)
+      test_property_trees_with_new_clip_tree_ = new PropertyTrees();
+    return test_property_trees_with_new_clip_tree_;
+  }
 
   void UpdatePropertyTreesForBoundsDelta();
 
@@ -476,6 +482,7 @@ class CC_EXPORT LayerTreeImpl {
   LayerImpl* root_layer_for_testing_;
   HeadsUpDisplayLayerImpl* hud_layer_;
   PropertyTrees property_trees_;
+  PropertyTrees* test_property_trees_with_new_clip_tree_;
   SkColor background_color_;
   bool has_transparent_background_;