Remove #pragma once from chrome/browser/extensions

chrome/browser/extensions/test_extension_service.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_TEST_EXTENSION_SERVICE_H_
 #define CHROME_BROWSER_EXTENSIONS_TEST_EXTENSION_SERVICE_H_
-#pragma once
 
 #include <string>
 #include <vector>
 
 #include "chrome/browser/extensions/extension_service.h"
 
 class CrxInstaller;
 
 namespace syncer {
 class SyncErrorFactory;
@@ skipping 52 matching lines @@
 
   virtual void UnloadExtension(
       const std::string& extension_id,
       extension_misc::UnloadedExtensionReason reason) OVERRIDE;
 
   virtual void SyncExtensionChangeIfNeeded(
       const extensions::Extension& extension) OVERRIDE;
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_TEST_EXTENSION_SERVICE_H_