Fix unused variables errors in cc/.

cc/animation/animation_host.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_host.h"
 
 #include <algorithm>
 
 #include "cc/animation/animation_player.h"
 #include "cc/animation/animation_registrar.h"
 #include "cc/animation/animation_timeline.h"
 #include "cc/animation/element_animations.h"
 #include "ui/gfx/geometry/box_f.h"
 
 namespace cc {
 
-scoped_ptr<AnimationHost> AnimationHost::Create(
-    ThreadInstance thread_instance) {
-  return make_scoped_ptr(new AnimationHost(thread_instance));
+scoped_ptr<AnimationHost> AnimationHost::Create() {
+  return make_scoped_ptr(new AnimationHost);
 }
 
-AnimationHost::AnimationHost(ThreadInstance thread_instance)
+AnimationHost::AnimationHost()
     : animation_registrar_(AnimationRegistrar::Create()),
-      mutator_host_client_(),
-      thread_instance_(thread_instance) {
+      mutator_host_client_() {

[vmpstr, 2015/07/06 20:00:41]

nit: Can you put nullptr in here while you're here?

[mlamouri (slow - plz ping), 2015/07/06 20:10:55]

Done.

 }
 
 AnimationHost::~AnimationHost() {
   ClearTimelines();
   DCHECK(!mutator_host_client());
   DCHECK(layer_to_element_animations_map_.empty());
 }
 
 AnimationTimeline* AnimationHost::GetTimelineById(int timeline_id) const {
   for (auto& timeline : timelines_)
@@ skipping 336 matching lines @@
   LayerAnimationController* controller = GetControllerForLayerId(layer_id);
   return controller ? controller->has_any_animation() : false;
 }
 
 bool AnimationHost::HasActiveAnimation(int layer_id) const {
   LayerAnimationController* controller = GetControllerForLayerId(layer_id);
   return controller ? controller->HasActiveAnimation() : false;
 }
 
 }  // namespace cc