[NOT FOR REVIEW]

cc/trees/layer_tree.h

Index: cc/trees/layer_tree.h
diff --git a/cc/trees/layer_tree.h b/cc/trees/layer_tree.h
index e58e71cb1f48f15d784d9d290a5c8c88ecefdee4..c6ba5f3020095dc1b1c3b5ab735311fdc30efa5c 100644
--- a/cc/trees/layer_tree.h
+++ b/cc/trees/layer_tree.h
@@ -134,6 +134,12 @@ class CC_EXPORT LayerTree : public MutatorHostClient {
   // |settings_.use_layer_lists| is true. This is a SPV2 setting.
   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 SetNeedsDisplayOnAllLayers();
 
   void SetNeedsCommit();
@@ -282,6 +288,8 @@ class CC_EXPORT LayerTree : public MutatorHostClient {
 
   PropertyTrees property_trees_;
 
+  PropertyTrees* test_property_trees_with_new_clip_tree_;
+
   bool needs_full_tree_sync_;
   bool needs_meta_info_recomputation_;