cc: Plumb group id through animation creation and start/finish notifications

cc/blink/web_compositor_support_impl.cc

 // 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.
 
 #include "cc/blink/web_compositor_support_impl.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "cc/animation/transform_operations.h"
 #include "cc/blink/web_animation_impl.h"
@@ skipping 76 matching lines @@
     bool is_left_side_vertical_scrollbar) {
   return new WebScrollbarLayerImpl(orientation,
                                    thumb_thickness,
                                    track_start,
                                    is_left_side_vertical_scrollbar);
 }
 
 WebCompositorAnimation* WebCompositorSupportImpl::createAnimation(
     const blink::WebCompositorAnimationCurve& curve,
     blink::WebCompositorAnimation::TargetProperty target,
+#ifdef WEB_COMPOSITOR_SUPPORT_CREATE_ANIMATION_SUPPORTS_GROUP
+    int group_id,
+#endif
     int animation_id) {
+#ifdef WEB_COMPOSITOR_SUPPORT_CREATE_ANIMATION_SUPPORTS_GROUP
+  return new WebCompositorAnimationImpl(curve, target, animation_id, group_id);
+#else
   return new WebCompositorAnimationImpl(curve, target, animation_id, 0);
+#endif
 }
 
 WebFilterAnimationCurve*
 WebCompositorSupportImpl::createFilterAnimationCurve() {
   return new WebFilterAnimationCurveImpl();
 }
 
 WebFloatAnimationCurve* WebCompositorSupportImpl::createFloatAnimationCurve() {
   return new WebFloatAnimationCurveImpl();
 }
@@ skipping 12 matching lines @@
 
 WebTransformOperations* WebCompositorSupportImpl::createTransformOperations() {
   return new WebTransformOperationsImpl();
 }
 
 WebFilterOperations* WebCompositorSupportImpl::createFilterOperations() {
   return new WebFilterOperationsImpl();
 }
 
 }  // namespace cc_blink