Add generic interfaces for the sinks of the media stream audio track

content/renderer/media/webrtc_audio_capturer_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/webrtc_audio_capturer_sink_owner.h"
-
-namespace content {
-
-WebRtcAudioCapturerSinkOwner::WebRtcAudioCapturerSinkOwner(
-    WebRtcAudioCapturerSink* sink)
-    : delegate_(sink) {
-}
-
-int WebRtcAudioCapturerSinkOwner::CaptureData(const std::vector<int>& channels,
-                                              const int16* audio_data,
-                                              int sample_rate,
-                                              int number_of_channels,
-                                              int number_of_frames,
-                                              int audio_delay_milliseconds,
-                                              int current_volume,
-                                              bool need_audio_processing,
-                                              bool key_pressed) {
-  base::AutoLock lock(lock_);
-  if (delegate_) {
-    return delegate_->CaptureData(channels,
-                                  audio_data,
-                                  sample_rate,
-                                  number_of_channels,
-                                  number_of_frames,
-                                  audio_delay_milliseconds,
-                                  current_volume,
-                                  need_audio_processing,
-                                  key_pressed);
-  }
-
-  return 0;
-}
-
-void WebRtcAudioCapturerSinkOwner::SetCaptureFormat(
-    const media::AudioParameters& params) {
-  base::AutoLock lock(lock_);
-  if (delegate_)
-    delegate_->SetCaptureFormat(params);
-}
-
-bool WebRtcAudioCapturerSinkOwner::IsEqual(
-    const WebRtcAudioCapturerSink* other) const {
-  base::AutoLock lock(lock_);
-  return (other == delegate_);
-}
-
-void WebRtcAudioCapturerSinkOwner::Reset() {
-  base::AutoLock lock(lock_);
-  delegate_ = NULL;
-}
-
-}  // namespace content