cc: Fix const value pattern by replacing it by non-const or reference.

cc/animation/animation_host_perftest.cc

 // Copyright 2016 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 "base/threading/thread_task_runner_handle.h"
 #include "cc/animation/animation_id_provider.h"
 #include "cc/animation/animation_player.h"
 #include "cc/animation/animation_timeline.h"
@@ skipping 38 matching lines @@
 
     layer_tree_host_->SetRootLayer(nullptr);
     layer_tree_host_ = nullptr;
   }
 
   AnimationHost* host() const { return animation_host_.get(); }
   AnimationHost* host_impl() const {
     return layer_tree_host_->host_impl()->animation_host();
   }
 
-  void CreatePlayers(const int num_players) {
+  void CreatePlayers(int num_players) {
     all_players_timeline_ =
         AnimationTimeline::Create(AnimationIdProvider::NextTimelineId());
     host()->AddAnimationTimeline(all_players_timeline_);
 
     first_player_id_ = AnimationIdProvider::NextPlayerId();
     last_player_id_ = first_player_id_;
 
     for (int i = 0; i < num_players; ++i) {
       scoped_refptr<Layer> layer = Layer::Create();
       root_layer_->AddChild(layer);
@@ skipping 12 matching lines @@
     layer_tree_host_->CommitAndCreateLayerImplTree();
 
     // Check impl instances created.
     scoped_refptr<AnimationTimeline> timeline_impl =
         host_impl()->GetTimelineById(all_players_timeline_->id());
     EXPECT_TRUE(timeline_impl);
     for (int i = first_player_id_; i < last_player_id_; ++i)
       EXPECT_TRUE(timeline_impl->GetPlayerById(i));
   }
 
-  void CreateTimelines(const int num_timelines) {
+  void CreateTimelines(int num_timelines) {
     first_timeline_id_ = AnimationIdProvider::NextTimelineId();
     last_timeline_id_ = first_timeline_id_;
 
     for (int i = 0; i < num_timelines; ++i) {
       scoped_refptr<AnimationTimeline> timeline =
           AnimationTimeline::Create(last_timeline_id_);
       last_timeline_id_ = AnimationIdProvider::NextTimelineId();
       host()->AddAnimationTimeline(timeline);
     }
 
@@ skipping 57 matching lines @@
   CreateTimelines(10);
   DoTest();
 }
 
 TEST_F(AnimationHostPerfTest, Push1000TimelinesPropertiesTo) {
   CreateTimelines(1000);
   DoTest();
 }
 
 }  // namespace cc