Remove #pragma once from chromeos

chromeos/dbus/ibus/mock_ibus_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_IBUS_MOCK_IBUS_CLIENT_H_
 #define CHROMEOS_DBUS_IBUS_MOCK_IBUS_CLIENT_H_
-#pragma once
 
 #include <string>
 #include "base/callback.h"
 #include "chromeos/dbus/ibus/ibus_client.h"
 
 namespace chromeos {
 
 class MockIBusClient : public IBusClient {
  public:
   MockIBusClient();
@@ skipping 47 matching lines @@
   RegisterComponentHandler register_component_handler_;
   int create_input_context_call_count_;
   int register_component_call_count_;
 
   DISALLOW_COPY_AND_ASSIGN(MockIBusClient);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_DBUS_IBUS_MOCK_IBUS_CLIENT_H_