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

cc/layers/nine_patch_layer_impl.h

 // Copyright 2012 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_LAYERS_NINE_PATCH_LAYER_IMPL_H_
 #define CC_LAYERS_NINE_PATCH_LAYER_IMPL_H_
 
+#include <string>
+
 #include "cc/base/cc_export.h"
 #include "cc/layers/layer_impl.h"
 #include "cc/resources/resource_provider.h"
 #include "ui/gfx/rect.h"
 #include "ui/gfx/size.h"
 
 namespace base {
 class DictionaryValue;
 }
 
@@ skipping 36 matching lines @@
   // The transparent center region that shows the parent layer's contents in
   // image space.
   gfx::Rect image_aperture_;
 
   ResourceProvider::ResourceId resource_id_;
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_NINE_PATCH_LAYER_IMPL_H_