Remove #pragma once from chromeos

chromeos/dbus/mock_cashew_client.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 CHROMEOS_DBUS_MOCK_CASHEW_CLIENT_H_
 #define CHROMEOS_DBUS_MOCK_CASHEW_CLIENT_H_
-#pragma once
 
 #include "chromeos/dbus/cashew_client.h"
 #include "testing/gmock/include/gmock/gmock.h"
 
 namespace chromeos {
 
 class MockCashewClient : public CashewClient {
  public:
   MockCashewClient();
   virtual ~MockCashewClient();
 
   MOCK_METHOD1(SetDataPlansUpdateHandler,
                void(const DataPlansUpdateHandler& handler));
   MOCK_METHOD0(ResetDataPlansUpdateHandler, void());
   MOCK_METHOD1(RequestDataPlansUpdate, void(const std::string& service));
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_DBUS_MOCK_CASHEW_CLIENT_H_