NULL -> nullptr under athena/

athena/system/background_controller.cc

 // Copyright 2014 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 "athena/system/background_controller.h"
 
 #include "athena/system/public/system_ui.h"
 #include "ui/aura/window.h"
 #include "ui/compositor/layer.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/image/image_skia.h"
 #include "ui/views/view.h"
 #include "ui/views/widget/widget.h"
 
 namespace athena {
 
 class BackgroundView : public views::View {
  public:
-  BackgroundView() : system_info_view_(NULL) {
+  BackgroundView() : system_info_view_(nullptr) {
     system_info_view_ =
         SystemUI::Get()->CreateSystemInfoView(SystemUI::COLOR_SCHEME_LIGHT);
     AddChildView(system_info_view_);
   }
   virtual ~BackgroundView() {}
 
   void SetImage(const gfx::ImageSkia& image) {
     image_ = image;
     SchedulePaint();
   }
@@ skipping 41 matching lines @@
   // background_widget is owned by the container and will be deleted
   // when the container is deleted.
 }
 
 void BackgroundController::SetImage(const gfx::ImageSkia& image) {
   // TODO(oshima): implement cross fede animation.
   background_view_->SetImage(image);
 }
 
 }  // namespace athena