Remove #pragma once from chrome/browser/extensions

chrome/browser/extensions/api/app_window/app_window_api.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_API_APP_WINDOW_APP_WINDOW_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_APP_WINDOW_APP_WINDOW_API_H_
-#pragma once
 
 #include "chrome/browser/extensions/extension_function.h"
 
 class ShellWindow;
 
 namespace extensions {
 
 class AppWindowExtensionFunction : public SyncExtensionFunction {
  protected:
   virtual ~AppWindowExtensionFunction() {}
@@ skipping 46 matching lines @@
   DECLARE_EXTENSION_FUNCTION_NAME("appWindow.restore");
 
  protected:
   virtual ~AppWindowRestoreFunction() {}
   virtual bool RunWithWindow(ShellWindow* window) OVERRIDE;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_APP_WINDOW_APP_WINDOW_API_H_