Run clang-modernize -use-nullptr over src/extensions/.

extensions/test/extension_test_message_listener.cc

 // Copyright (c) 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.
 
 #include "extensions/test/extension_test_message_listener.h"
 
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_source.h"
@@ skipping 37 matching lines @@
   content::RunMessageLoop();
   return !failed_;
 }
 
 void ExtensionTestMessageListener::Reply(const std::string& message) {
   CHECK(satisfied_);
   CHECK(!replied_);
 
   replied_ = true;
   function_->Reply(message);
-  function_ = NULL;
+  function_ = nullptr;
 }
 
 void ExtensionTestMessageListener::Reply(int message) {
   Reply(base::IntToString(message));
 }
 
 void ExtensionTestMessageListener::ReplyWithError(const std::string& error) {
   CHECK(satisfied_);
   CHECK(!replied_);
 
   replied_ = true;
   function_->ReplyWithError(error);
-  function_ = NULL;
+  function_ = nullptr;
 }
 
 void ExtensionTestMessageListener::Reset() {
   satisfied_ = false;
   failed_ = false;
   message_.clear();
   replied_ = false;
 }
 
 void ExtensionTestMessageListener::Observe(
@@ skipping 25 matching lines @@
     function_ = function;
     if (!will_reply_)
       Reply(std::string());
 
     if (waiting_) {
       waiting_ = false;
       base::MessageLoopForUI::current()->Quit();
     }
   }
 }