CC Animations: Make LayerAnimationController creation optional

content/test/web_layer_tree_view_impl_for_testing.h

 // Copyright 2013 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 CONTENT_TEST_WEB_LAYER_TREE_VIEW_IMPL_FOR_TESTING_H_
 #define CONTENT_TEST_WEB_LAYER_TREE_VIEW_IMPL_FOR_TESTING_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "cc/trees/layer_tree_host_client.h"
 #include "cc/trees/layer_tree_host_single_thread_client.h"
@@ skipping 35 matching lines @@
                                            float maximum);
   virtual void startPageScaleAnimation(const blink::WebPoint& destination,
                                        bool use_anchor,
                                        float new_page_scale,
                                        double duration_sec);
   virtual void setNeedsAnimate();
   virtual bool commitRequested() const;
   virtual void didStopFlinging();
   virtual void finishAllRendering();
   virtual void setDeferCommits(bool defer_commits);
+  virtual void registerForAnimations(blink::WebLayer* layer);
   virtual void registerViewportLayers(
       const blink::WebLayer* overscrollElasticityLayer,
       const blink::WebLayer* pageScaleLayerLayer,
       const blink::WebLayer* innerViewportScrollLayer,
       const blink::WebLayer* outerViewportScrollLayer) override;
   virtual void clearViewportLayers() override;
   virtual void registerSelection(const blink::WebSelection& selection) override;
   virtual void clearSelection() override;
 
   // cc::LayerTreeHostClient implementation.
@@ skipping 25 matching lines @@
 
  private:
   scoped_ptr<cc::LayerTreeHost> layer_tree_host_;
 
   DISALLOW_COPY_AND_ASSIGN(WebLayerTreeViewImplForTesting);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_TEST_WEB_LAYER_TREE_VIEW_IMPL_FOR_TESTING_H_