NULL -> nullptr under athena/

athena/test/base/sample_activity.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/test/base/sample_activity.h"
 
 #include "ui/gfx/image/image_skia.h"
 #include "ui/views/background.h"
 #include "ui/views/view.h"
 #include "ui/views/widget/widget.h"
 
 namespace athena {
 namespace test {
 
 SampleActivity::SampleActivity(SkColor color,
                                SkColor contents_color,
                                const base::string16& title)
     : color_(color),
       contents_color_(contents_color),
       title_(title),
-      contents_view_(NULL),
+      contents_view_(nullptr),
       current_state_(ACTIVITY_UNLOADED) {
 }
 
 SampleActivity::~SampleActivity() {
 }
 
 athena::ActivityViewModel* SampleActivity::GetActivityViewModel() {
   return this;
 }
 
 void SampleActivity::SetCurrentState(Activity::ActivityState state) {
   current_state_ = state;
 }
 
 Activity::ActivityState SampleActivity::GetCurrentState() {
   return current_state_;
 }
 
 bool SampleActivity::IsVisible() {
   return contents_view_ && contents_view_->IsDrawn();
 }
 
 Activity::ActivityMediaState SampleActivity::GetMediaState() {
   return Activity::ACTIVITY_MEDIA_STATE_NONE;
 }
 
 aura::Window* SampleActivity::GetWindow() {
-  return !contents_view_ ? NULL
+  return !contents_view_ ? nullptr
                          : contents_view_->GetWidget()->GetNativeWindow();
 }
 
 content::WebContents* SampleActivity::GetWebContents() {
-  return NULL;
+  return nullptr;
 }
 
 void SampleActivity::Init() {
 }
 
 SkColor SampleActivity::GetRepresentativeColor() const {
   return color_;
 }
 
 base::string16 SampleActivity::GetTitle() const {
@@ skipping 11 matching lines @@
 views::View* SampleActivity::GetContentsView() {
   if (!contents_view_) {
     contents_view_ = new views::View;
     contents_view_->set_background(
         views::Background::CreateSolidBackground(contents_color_));
   }
   return contents_view_;
 }
 
 views::Widget* SampleActivity::CreateWidget() {
-  return NULL;
+  return nullptr;
 }
 
 gfx::ImageSkia SampleActivity::GetOverviewModeImage() {
   return gfx::ImageSkia();
 }
 
 void SampleActivity::PrepareContentsForOverview() {
 }
 
 void SampleActivity::ResetContentsView() {
 }
 
 }  // namespace test
 }  // namespace athena