Remove #pragma once from chrome/browser/extensions

chrome/browser/extensions/app_notification_test_util.h

 // Copyright (c) 2011 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_APP_NOTIFICATION_TEST_UTIL_H_
 #define CHROME_BROWSER_EXTENSIONS_APP_NOTIFICATION_TEST_UTIL_H_
-#pragma once
 
 #include "chrome/browser/extensions/app_notification.h"
 
 class AppNotificationManager;
 
 namespace app_notification_test_util {
 
 // Does a deep equality check of two AppNotificationList's, adding a gtest
 // failure and logging at the first difference found.
 void ExpectListsEqual(const AppNotificationList& one,
                       const AppNotificationList& two);
 
 // Helper for inserting |count| dummy notifications with |prefix| in their
 // title and body into |list|.
 void AddNotifications(AppNotificationList* list,
                       const std::string& extension_id,
                       int count,
                       const std::string& prefix);
 
 // Adds a copy of each item in |list| to |manager|.
 bool AddCopiesFromList(AppNotificationManager* manager,
                        const AppNotificationList& list);
 
 }  // namespace app_notification_test_util
 
 #endif  // CHROME_BROWSER_EXTENSIONS_APP_NOTIFICATION_TEST_UTIL_H_