CC Animations: Fix AnimationHost mode integration with Property Trees.

cc/animation/animation_player.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/animation/animation_player.h"
 
 #include "cc/animation/animation_delegate.h"
 #include "cc/animation/animation_host.h"
 #include "cc/animation/animation_timeline.h"
 #include "cc/animation/element_animations.h"
@@ skipping 166 matching lines @@
     Animation::TargetProperty target_property,
     int group) {
   if (layer_animation_delegate_)
     layer_animation_delegate_->NotifyAnimationFinished(monotonic_time,
                                                        target_property, group);
 }
 
 void AnimationPlayer::SetNeedsCommit() {
   DCHECK(animation_host_);
   animation_host_->SetNeedsCommit();
+  animation_host_->SetNeedsRebuildPropertyTrees();
 }
 
 }  // namespace cc