Remove #pragma once from chrome/browser/extensions

chrome/browser/extensions/platform_app_browsertest_util.h

 // 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_PLATFORM_APP_BROWSERTEST_UTIL_H_
 #define CHROME_BROWSER_EXTENSIONS_PLATFORM_APP_BROWSERTEST_UTIL_H_
-#pragma once
 
 
 #include "chrome/browser/extensions/extension_apitest.h"
 
 namespace extensions {
 class Extension;
 }
 
 namespace content {
 class WebContents;
@@ skipping 38 matching lines @@
   void SetCommandLineArg(const std::string& test_file);
 
   // Creates an empty shell window for |extension|.
   ShellWindow* CreateShellWindow(const extensions::Extension* extension);
 
   // Closes |window| and waits until it's gone.
   void CloseShellWindow(ShellWindow* window);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_PLATFORM_APP_BROWSERTEST_UTIL_H_