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

content/renderer/media/webrtc/webrtc_audio_sink_adapter.h

Index: content/renderer/media/webrtc/webrtc_audio_sink_adapter.h
diff --git a/content/renderer/media/webrtc/webrtc_audio_sink_adapter.h b/content/renderer/media/webrtc/webrtc_audio_sink_adapter.h
new file mode 100644
index 0000000000000000000000000000000000000000..fc67c42c8f521d94c8c6546b2d610218a7e96795
--- /dev/null
+++ b/content/renderer/media/webrtc/webrtc_audio_sink_adapter.h
@@ -0,0 +1,51 @@
+// Copyright 2014 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 CONTENT_RENDERER_MEDIA_WEBRTC_WEBRTC_AUDIO_SINK_ADAPTER_H_
+#define CONTENT_RENDERER_MEDIA_WEBRTC_WEBRTC_AUDIO_SINK_ADAPTER_H_
+
+#include <stdint.h>
+
+#include <memory>
+
+#include "base/macros.h"
+#include "content/public/renderer/media_stream_audio_sink.h"
+#include "media/base/audio_parameters.h"
+
+namespace webrtc {
+class AudioTrackSinkInterface;
+}  // namespace webrtc
+
+namespace content {
+
+// Adapter to the webrtc::AudioTrackSinkInterface of the audio track.
+// This class is used in between the MediaStreamAudioSink and
+// webrtc::AudioTrackSinkInterface. It gets data callback via the
+// MediaStreamAudioSink::OnData() interface and pass the data to
+// webrtc::AudioTrackSinkInterface.
+class WebRtcAudioSinkAdapter : public MediaStreamAudioSink {
+ public:
+  explicit WebRtcAudioSinkAdapter(
+      webrtc::AudioTrackSinkInterface* sink);
+  ~WebRtcAudioSinkAdapter() override;
+
+  bool IsEqual(const webrtc::AudioTrackSinkInterface* other) const;
+
+ private:
+  // MediaStreamAudioSink implementation.
+  void OnData(const media::AudioBus& audio_bus,
+              base::TimeTicks estimated_capture_time) override;
+  void OnSetFormat(const media::AudioParameters& params) override;
+
+  webrtc::AudioTrackSinkInterface* const sink_;
+
+  media::AudioParameters params_;
+  std::unique_ptr<int16_t[]> interleaved_data_;
+
+  DISALLOW_COPY_AND_ASSIGN(WebRtcAudioSinkAdapter);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_MEDIA_WEBRTC_WEBRTC_AUDIO_SINK_ADAPTER_H_