Left side vertical MD scrollbars grow toward right.

cc/test/layer_test_common.h

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_TEST_LAYER_TEST_COMMON_H_
 #define CC_TEST_LAYER_TEST_COMMON_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 84 matching lines @@
 
     template <typename T, typename A, typename B>
     T* AddChildToRoot(const A& a, const B& b) {
       std::unique_ptr<T> layer =
           T::Create(host_->host_impl()->active_tree(), layer_impl_id_++, a, b);
       T* ptr = layer.get();
       root_layer_for_testing()->test_properties()->AddChild(std::move(layer));
       return ptr;
     }
 
+    template <typename T, typename A, typename B, typename C>
+    T* AddChildToRoot(const A& a, const B& b, const C& c) {
+      std::unique_ptr<T> layer = T::Create(host_->host_impl()->active_tree(),
+                                           layer_impl_id_++, a, b, c);
+      T* ptr = layer.get();
+      root_layer_for_testing()->test_properties()->AddChild(std::move(layer));
+      return ptr;
+    }
+
     template <typename T, typename A, typename B, typename C, typename D>
     T* AddChildToRoot(const A& a, const B& b, const C& c, const D& d) {
       std::unique_ptr<T> layer = T::Create(host_->host_impl()->active_tree(),
                                            layer_impl_id_++, a, b, c, d);
       T* ptr = layer.get();
       root_layer_for_testing()->test_properties()->AddChild(std::move(layer));
       return ptr;
     }
 
     template <typename T,
@@ skipping 55 matching lines @@
     std::unique_ptr<RenderPass> render_pass_;
     scoped_refptr<AnimationTimeline> timeline_;
     scoped_refptr<AnimationTimeline> timeline_impl_;
     int layer_impl_id_;
   };
 };
 
 }  // namespace cc
 
 #endif  // CC_TEST_LAYER_TEST_COMMON_H_