Web MIDI: make naming convention be consistent

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,
+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();
+  MidiPortInfo(const MidiPortInfo& info);
+  ~MidiPortInfo();
 
   std::string id;
   std::string manufacturer;
   std::string name;
   std::string version;
 };
 
-typedef std::vector<MIDIPortInfo> MIDIPortInfoList;
+typedef std::vector<MidiPortInfo> MidiPortInfoList;
 
 }  // namespace media
 
 #endif  // MEDIA_MIDI_MIDI_PORT_INFO_H_