Run smooth scroll animations on the compositor when possible

cc/blink/web_compositor_animation_player_impl.cc

 // Copyright 2015 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_animation_player_impl.h"
 
 #include "cc/animation/animation_id_provider.h"
 #include "cc/animation/animation_player.h"
 #include "cc/blink/web_animation_impl.h"
 #include "cc/blink/web_to_cc_animation_delegate_adapter.h"
@@ skipping 45 matching lines @@
 
 void WebCompositorAnimationPlayerImpl::removeAnimation(int animation_id) {
   animation_player_->RemoveAnimation(animation_id);
 }
 
 void WebCompositorAnimationPlayerImpl::pauseAnimation(int animation_id,
                                                       double time_offset) {
   animation_player_->PauseAnimation(animation_id, time_offset);
 }
 
+void WebCompositorAnimationPlayerImpl::abortAnimation(int animation_id) {
+  animation_player_->AbortAnimation(animation_id);
+}
+
 }  // namespace cc_blink