NULL -> nullptr under athena/

athena/extensions/chrome/athena_chrome_app_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/chrome/athena_chrome_app_delegate.h"
 
 #include "chrome/browser/extensions/chrome_extension_web_contents_observer.h"
 #include "chrome/browser/favicon/favicon_tab_helper.h"
 #include "chrome/browser/file_select_helper.h"
 #include "chrome/browser/media/media_capture_devices_dispatcher.h"
@@ skipping 63 matching lines @@
     content::MediaStreamType type,
     const extensions::Extension* extension) {
   return MediaCaptureDevicesDispatcher::GetInstance()
       ->CheckMediaAccessPermission(
           web_contents, security_origin, type, extension);
 }
 
 void AthenaChromeAppDelegate::SetWebContentsBlocked(
     content::WebContents* web_contents,
     bool blocked) {
-  // RenderViewHost may be NULL during shutdown.
+  // RenderViewHost may be nullptr during shutdown.
   content::RenderViewHost* host = web_contents->GetRenderViewHost();
   if (host) {
     host->Send(new ChromeViewMsg_SetVisuallyDeemphasized(host->GetRoutingID(),
                                                          blocked));
   }
 }
 
 }  // namespace athena