Web MIDI: use midi_service.mojom for media::midi::Result

media/midi/result.h

-// Copyright 2015 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_RESULT_H_
-#define MEDIA_MIDI_RESULT_H_
-
-namespace media {
-namespace midi {
-
-// Result codes for MIDI.
-enum class Result {
-  NOT_INITIALIZED = 0,
-  OK,
-  NOT_SUPPORTED,
-  INITIALIZATION_ERROR,
-  // New code should be inserted here so that existing members keep the same
-  // assigned value. tools/metrics/histograms/histograms.xml contains Result
-  // enum entry, and it should be consistent with enum class Result.
-
-  // |MAX| is used in content/common/media/midi_messages.h with
-  // IPC_ENUM_TRAITS_MAX_VALUE macro. Keep the value up to date. Otherwise
-  // a new value can not be passed to the renderer.
-  MAX = INITIALIZATION_ERROR,
-};
-
-}  // namespace midi
-}  // namespace media
-
-#endif  // MEDIA_MIDI_RESULT_H_