Remove #pragma once from chromeos

chromeos/dbus/mock_cros_disks_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_CROS_DISKS_CLIENT_H_
 #define CHROMEOS_DBUS_MOCK_CROS_DISKS_CLIENT_H_
-#pragma once
 
 #include <string>
 
 #include "chromeos/dbus/cros_disks_client.h"
 #include "testing/gmock/include/gmock/gmock.h"
 
 namespace chromeos {
 
 class MockCrosDisksClient : public CrosDisksClient {
  public:
@@ skipping 19 matching lines @@
   MOCK_METHOD3(GetDeviceProperties, void(const std::string&,
                                          const GetDevicePropertiesCallback&,
                                          const ErrorCallback&));
   MOCK_METHOD2(SetUpConnections, void(const MountEventHandler&,
                                       const MountCompletedHandler&));
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_DBUS_MOCK_CROS_DISKS_CLIENT_H_