CC Animations: Make LayerAnimationController creation optional

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"
 #include "cc/layers/layer_lists.h"
 #include "cc/test/fake_layer_tree_host_client.h"
+#include "cc/trees/layer_tree_settings.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace gfx {
 class PointF;
 class Point3F;
 class Size;
 class Transform;
 }
 
 namespace cc {
@@ skipping 88 matching lines @@
   LayerImplList* render_surface_layer_list_impl() const {
     return render_surface_layer_list_impl_.get();
   }
 
   int render_surface_layer_list_count() const {
     return render_surface_layer_list_count_;
   }
 
   scoped_ptr<FakeLayerTreeHost> CreateFakeLayerTreeHost();
 
+  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_;
+  LayerSettings layer_settings_;
 
   FakeLayerTreeHostClient client_;
   int render_surface_layer_list_count_;
 };
 
 class LayerTreeHostCommonTest : public LayerTreeHostCommonTestBase,
                                 public testing::Test {};
 
 }  // namespace cc
 
 #endif  // CC_TEST_LAYER_TREE_HOST_COMMON_TEST_H_