Add mojo interface+impl for audio stream control.

media/mojo/interfaces/audio_output.mojom

Index: media/mojo/interfaces/audio_output.mojom
diff --git a/media/mojo/interfaces/audio_output.mojom b/media/mojo/interfaces/audio_output.mojom
deleted file mode 100644
index 895a93e4967727e4d2846679b50433a2de46ff94..0000000000000000000000000000000000000000
--- a/media/mojo/interfaces/audio_output.mojom
+++ /dev/null
@@ -1,33 +0,0 @@
-// Copyright 2016 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.
-
-module media.mojom;
-
-import "media/mojo/interfaces/audio_parameters.mojom";
-
-// This interface handles audio output stream operations.
-// It allows to close a stream.
-// TODO(rchtara): Add methods that allow the interaction with audio output
-// streams: Play, Pause and SetVolume to this interface.
-// See crbug.com/606707 for more details.
-interface AudioOutputStream {
-  Close();
-};
-
-// This interface manages audio output streams.
-// It allows to create an AudioOutputStream.
-// TODO(rchtara): Add a method to request device authorization to this
-// interface.
-// See crbug.com/606707 for more details.
-interface AudioOutput {
-  // TODO(rchtara): Remove |stream_id| from AudioOutput::CreateStream when all
-  // the stream operations are mojofied.
-  CreateStream(
-      int32 stream_id,
-      AudioParameters params) =>
-      (int32 stream_id,
-       AudioOutputStream? stream,
-       handle<shared_buffer>? shared_buffer,
-       handle? socket_descriptor);
-};