CC Animation: Use unordered_map instead of vector.

cc/animation/animation_timeline.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_timeline.h"
 
 #include <algorithm>
 
 #include "cc/animation/animation_player.h"
 
@@ skipping 20 matching lines @@
 void AnimationTimeline::SetAnimationHost(AnimationHost* animation_host) {
   animation_host_ = animation_host;
   for (auto& kv : id_to_player_map_)
     kv.second->SetAnimationHost(animation_host);
 }
 
 void AnimationTimeline::AttachPlayer(scoped_refptr<AnimationPlayer> player) {
   DCHECK(player->id());
   player->SetAnimationHost(animation_host_);
   player->SetAnimationTimeline(this);
-  id_to_player_map_.insert(std::make_pair(player->id(), player));
+  id_to_player_map_.insert(std::make_pair(player->id(), std::move(player)));
 }
 
 void AnimationTimeline::DetachPlayer(scoped_refptr<AnimationPlayer> player) {
   DCHECK(player->id());
   ErasePlayer(player);
   id_to_player_map_.erase(player->id());
 }
 
 AnimationPlayer* AnimationTimeline::GetPlayerById(int player_id) const {
   auto f = id_to_player_map_.find(player_id);
@@ skipping 51 matching lines @@
     AnimationTimeline* timeline_impl) {
   for (auto& kv : id_to_player_map_) {
     AnimationPlayer* player = kv.second.get();
     AnimationPlayer* player_impl = timeline_impl->GetPlayerById(player->id());
     if (player_impl)
       player->PushPropertiesTo(player_impl);
   }
 }
 
 }  // namespace cc