Add a stub implementation for Mojo AudioDecoder interface

media/mojo/services/mojo_audio_decoder_service.cc

+// 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.
+
+#include "base/logging.h"
+#include "media/mojo/services/mojo_audio_decoder_service.h"
+
+namespace media {
+
+MojoAudioDecoderService::MojoAudioDecoderService(
+    scoped_ptr<AudioDecoder> decoder,
+    mojo::InterfaceRequest<interfaces::AudioDecoder> request)
+    : binding_(this, std::move(request)), decoder_(std::move(decoder)) {}
+
+MojoAudioDecoderService::~MojoAudioDecoderService() {}
+
+void MojoAudioDecoderService::Initialize(
+    interfaces::AudioDecoderClientPtr client,
+    interfaces::AudioDecoderConfigPtr config,
+    int32_t cdm_id,
+    const InitializeCallback& callback) {
+  NOTIMPLEMENTED();
+  callback.Run(false, false);
+}
+
+void MojoAudioDecoderService::Decode(interfaces::DecoderBufferPtr buffer,
+                                     const DecodeCallback& callback) {
+  NOTIMPLEMENTED();
+  callback.Run(DecodeStatus::DECODE_ERROR);
+}
+
+void MojoAudioDecoderService::Reset(const ResetCallback& callback) {
+  NOTIMPLEMENTED();
+  callback.Run();
+}
+
+}  // namespace media