Remove #pragma once from chrome/browser/policy

chrome/browser/policy/mock_device_management_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_POLICY_MOCK_DEVICE_MANAGEMENT_SERVICE_H_
 #define CHROME_BROWSER_POLICY_MOCK_DEVICE_MANAGEMENT_SERVICE_H_
-#pragma once
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "chrome/browser/policy/device_management_service.h"
 #include "chrome/browser/policy/proto/device_management_backend.pb.h"
 #include "testing/gmock/include/gmock/gmock.h"
 
 namespace policy {
 
@@ skipping 36 matching lines @@
   testing::Action<CreateJobFunction> CreateAsyncJob(
       MockDeviceManagementJob** job);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MockDeviceManagementService);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_MOCK_DEVICE_MANAGEMENT_SERVICE_H_