Fix unused variables errors in cc/.

cc/test/animation_timelines_test_common.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/test/animation_timelines_test_common.h"
 
 #include "cc/animation/animation_events.h"
 #include "cc/animation/animation_id_provider.h"
 #include "cc/animation/animation_player.h"
 #include "cc/animation/animation_registrar.h"
@@ skipping 17 matching lines @@
   transform_x_ = 0;
   transform_y_ = 0;
 
   opacity_ = 0;
   brightness_ = 0;
 
   for (int i = 0; i <= Animation::LAST_TARGET_PROPERTY; ++i)
     mutated_properties_[i] = false;
 }
 
-TestHostClient::TestHostClient(ThreadInstance thread_instance)
-    : host_(AnimationHost::Create(thread_instance)),
-      mutators_need_commit_(false) {
+TestHostClient::TestHostClient()
+    : host_(AnimationHost::Create()), mutators_need_commit_(false) {
   host_->SetMutatorHostClient(this);
 }
 
 TestHostClient::~TestHostClient() {
   host_->SetMutatorHostClient(nullptr);
 }
 
 void TestHostClient::ClearMutatedProperties() {
   for (auto& kv : layers_in_pending_tree_)
     kv.second->ClearMutatedProperties();
@@ skipping 135 matching lines @@
   started_ = true;
 }
 void TestAnimationDelegate::NotifyAnimationFinished(
     base::TimeTicks monotonic_time,
     Animation::TargetProperty target_property,
     int group) {
   finished_ = true;
 }
 
 AnimationTimelinesTest::AnimationTimelinesTest()
-    : client_(ThreadInstance::MAIN),
-      client_impl_(ThreadInstance::IMPL),
-      timeline_id_(AnimationIdProvider::NextTimelineId()),
+    : timeline_id_(AnimationIdProvider::NextTimelineId()),
       player_id_(AnimationIdProvider::NextPlayerId()),
       layer_id_(1) {
   host_ = client_.host();
   host_impl_ = client_impl_.host();
 }
 
 AnimationTimelinesTest::~AnimationTimelinesTest() {
 }
 
 void AnimationTimelinesTest::SetUp() {
@@ skipping 38 matching lines @@
 }
 
 AnimationPlayer* AnimationTimelinesTest::GetImplPlayerForLayerId(int layer_id) {
   const ElementAnimations* element_animations =
       host_impl_->GetElementAnimationsForLayerId(layer_id);
   return element_animations ? element_animations->players_list().head()->value()
                             : nullptr;
 }
 
 }  // namespace cc