Remove #pragma once from ash

ash/shell/content_client/shell_browser_main_parts.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 ASH_SHELL_CONTENT_CLIENT_EXAMPLES_BROWSER_MAIN_PARTS_H_
 #define ASH_SHELL_CONTENT_CLIENT_EXAMPLES_BROWSER_MAIN_PARTS_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/public/browser/browser_main_parts.h"
 
 namespace base {
 class Thread;
 }
 
 namespace content {
@@ skipping 27 matching lines @@
   scoped_ptr<content::ShellBrowserContext> browser_context_;
   scoped_ptr<ash::shell::WindowWatcher> window_watcher_;
 
   DISALLOW_COPY_AND_ASSIGN(ShellBrowserMainParts);
 };
 
 }  // namespace shell
 }  // namespace ash
 
 #endif  // ASH_SHELL_CONTENT_CLIENT_EXAMPLES_BROWSER_MAIN_PARTS_H_