Fix cpplint errors in cc/(animation|input|layers|trees|test)/

cc/animation/animation_id_provider.h

 // Copyright (c) 2013 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.
 
 #ifndef CC_ANIMATION_ANIMATION_ID_PROVIDER_H_
 #define CC_ANIMATION_ANIMATION_ID_PROVIDER_H_
 
 #include "cc/base/cc_export.h"
 
 namespace cc {
 
 class CC_EXPORT AnimationIdProvider {
  public:
   // These functions each return monotonically increasing values.
   static int NextAnimationId();
   static int NextGroupId();
 };
 
-}
+}  // namespace cc
 
 #endif  // CC_ANIMATION_ANIMATION_ID_PROVIDER_H_