Revert 207992: This looks like a reland of r207983, which was reverted in

trunk/src/media/midi/midi_port_info.h

-// Copyright (c) 2013 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 MEDIA_MIDI_MIDI_PORT_INFO_H_
-#define MEDIA_MIDI_MIDI_PORT_INFO_H_
-
-#include <string>
-#include <vector>
-
-#include "base/basictypes.h"
-#include "media/base/media_export.h"
-
-namespace media {
-
-struct MEDIA_EXPORT MIDIPortInfo {
-  MIDIPortInfo();
-  MIDIPortInfo(const std::string& in_id,
-               const std::string& in_manufacturer,
-               const std::string& in_name,
-               const std::string& in_version);
-
-  MIDIPortInfo(const MIDIPortInfo& info);
-  ~MIDIPortInfo();
-
-  std::string id;
-  std::string manufacturer;
-  std::string name;
-  std::string version;
-};
-
-typedef std::vector<MIDIPortInfo> MIDIPortInfoList;
-
-}  // namespace media
-
-#endif  // MEDIA_MIDI_MIDI_PORT_INFO_H_