CC Animations: Make LayerAnimationController creation optional

content/test/web_layer_tree_view_impl_for_testing.cc

 // 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.
 
 #include "content/test/web_layer_tree_view_impl_for_testing.h"
 
 #include "base/command_line.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/synchronization/lock.h"
 #include "base/thread_task_runner_handle.h"
@@ skipping 144 matching lines @@
   bool flipped_output_surface = false;
   layer_tree_host_->SetOutputSurface(
       make_scoped_ptr(new cc::PixelTestOutputSurface(
           cc::TestContextProvider::Create(), flipped_output_surface)));
 }
 
 void WebLayerTreeViewImplForTesting::DidFailToInitializeOutputSurface() {
   RequestNewOutputSurface();
 }
 
+void WebLayerTreeViewImplForTesting::registerForAnimations(
+    blink::WebLayer* layer) {
+  cc::Layer* cc_layer = static_cast<cc_blink::WebLayerImpl*>(layer)->layer();
+  cc_layer->RegisterForAnimations(layer_tree_host_->animation_registrar());
+}
+
 void WebLayerTreeViewImplForTesting::registerViewportLayers(
     const blink::WebLayer* overscrollElasticityLayer,
     const blink::WebLayer* pageScaleLayer,
     const blink::WebLayer* innerViewportScrollLayer,
     const blink::WebLayer* outerViewportScrollLayer) {
   layer_tree_host_->RegisterViewportLayers(
       // The scroll elasticity layer will only exist when using pinch virtual
       // viewports.
       overscrollElasticityLayer
           ? static_cast<const cc_blink::WebLayerImpl*>(
@@ skipping 18 matching lines @@
 }
 
 void WebLayerTreeViewImplForTesting::registerSelection(
     const blink::WebSelection& selection) {
 }
 
 void WebLayerTreeViewImplForTesting::clearSelection() {
 }
 
 }  // namespace content