MediaStream audio: Refactor 3 separate "glue" implementations into one.

content/renderer/media/media_stream_audio_sink_owner.cc

-// Copyright 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.
-
-#include "content/renderer/media/media_stream_audio_sink_owner.h"
-
-#include "content/public/renderer/media_stream_audio_sink.h"
-#include "media/base/audio_parameters.h"
-
-namespace content {
-
-MediaStreamAudioSinkOwner::MediaStreamAudioSinkOwner(MediaStreamAudioSink* sink)
-    : delegate_(sink) {
-}
-
-void MediaStreamAudioSinkOwner::OnData(const media::AudioBus& audio_bus,
-                                       base::TimeTicks estimated_capture_time) {
-  base::AutoLock lock(lock_);
-  if (delegate_)
-    delegate_->OnData(audio_bus, estimated_capture_time);
-}
-
-void MediaStreamAudioSinkOwner::OnSetFormat(
-    const media::AudioParameters& params) {
-  base::AutoLock lock(lock_);
-  if (delegate_)
-    delegate_->OnSetFormat(params);
-}
-
-void MediaStreamAudioSinkOwner::OnReadyStateChanged(
-    blink::WebMediaStreamSource::ReadyState state) {
-  base::AutoLock lock(lock_);
-  if (delegate_)
-    delegate_->OnReadyStateChanged(state);
-}
-
-void MediaStreamAudioSinkOwner::Reset() {
-  base::AutoLock lock(lock_);
-  delegate_ = NULL;
-}
-
-bool MediaStreamAudioSinkOwner::IsEqual(
-    const MediaStreamAudioSink* other) const {
-  DCHECK(other);
-  base::AutoLock lock(lock_);
-  return (other == delegate_);
-}
-
-}  // namespace content