cc: Convert backface LTHCommon tests from Layer->LayerImpl

cc/test/layer_tree_host_common_test.h

 // Copyright 2014 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_TREE_HOST_COMMON_TEST_H_
 #define CC_TEST_LAYER_TREE_HOST_COMMON_TEST_H_
 
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 101 matching lines @@
   void ExecuteCalculateDrawPropertiesWithPropertyTrees(LayerImpl* layer);
 
   RenderSurfaceLayerList* render_surface_layer_list() const {
     return render_surface_layer_list_.get();
   }
 
   LayerImplList* render_surface_layer_list_impl() const {
     return render_surface_layer_list_impl_.get();
   }
 
+  const LayerList& update_layer_list() const { return update_layer_list_; }
+  bool UpdateLayerListContains(int id) const;
+
   int render_surface_layer_list_count() const {
     return render_surface_layer_list_count_;
   }
 
   const LayerSettings& layer_settings() { return layer_settings_; }
 
  private:
   scoped_ptr<RenderSurfaceLayerList> render_surface_layer_list_;
   scoped_ptr<std::vector<LayerImpl*>> render_surface_layer_list_impl_;
+  LayerList update_layer_list_;
   LayerSettings layer_settings_;
 
   int render_surface_layer_list_count_;
 };
 
 class LayerTreeHostCommonTest : public LayerTreeHostCommonTestBase,
                                 public testing::Test {
  public:
   LayerTreeHostCommonTest();
   explicit LayerTreeHostCommonTest(const LayerTreeSettings& settings);
 };
 
 }  // namespace cc
 
 #endif  // CC_TEST_LAYER_TREE_HOST_COMMON_TEST_H_