NULL -> nullptr under athena/

athena/extensions/test/test_extensions_delegate.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/extensions/public/extensions_delegate.h"
 #include "base/macros.h"
 #include "extensions/browser/install/extension_install_ui.h"
 #include "extensions/common/extension_set.h"
 
 namespace athena {
 namespace {
 
 class TestExtensionsDelegate : public ExtensionsDelegate {
  public:
   TestExtensionsDelegate() {}
 
   virtual ~TestExtensionsDelegate() {}
 
  private:
   // ExtensionsDelegate:
   virtual content::BrowserContext* GetBrowserContext() const override {
-    return NULL;
+    return nullptr;
   }
   virtual const extensions::ExtensionSet& GetInstalledExtensions() override {
     return shell_extensions_;
   }
   virtual bool LaunchApp(const std::string& app_id) override { return true; }
   virtual bool UnloadApp(const std::string& app_id) override { return false; }
 
   virtual scoped_ptr<extensions::ExtensionInstallUI> CreateExtensionInstallUI()
       override {
     return scoped_ptr<extensions::ExtensionInstallUI>();
   }
 
   extensions::ExtensionSet shell_extensions_;
 
   DISALLOW_COPY_AND_ASSIGN(TestExtensionsDelegate);
 };
 
 }  // namespace
 
 // static
 void ExtensionsDelegate::CreateExtensionsDelegateForTest() {
   new TestExtensionsDelegate();
 }
 
 }  // namespace athena