Redesign the copresence audio handlers.

components/copresence/mediums/audio/audio_recorder.h

 // 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 COMPONENTS_COPRESENCE_MEDIUMS_AUDIO_AUDIO_RECORDER_H_
 #define COMPONENTS_COPRESENCE_MEDIUMS_AUDIO_AUDIO_RECORDER_H_
 
 #include <string>
 
 #include "base/gtest_prod_util.h"
@@ skipping 10 matching lines @@
 namespace media {
 class AudioBus;
 }
 
 namespace copresence {
 
 // The AudioRecorder class will record audio until told to stop.
 class AudioRecorder : public media::AudioInputStream::AudioInputCallback,
                       public media::AudioConverter::InputCallback {
  public:
-  typedef base::Callback<void(const std::string&)> DecodeSamplesCallback;
+  typedef base::Callback<void(const std::string&)> RecordedSamplesCallback;
 
-  explicit AudioRecorder(const DecodeSamplesCallback& decode_callback);
+  AudioRecorder();
 
   // Initializes the object. Do not use this object before calling this method.
-  virtual void Initialize();
+  virtual void Initialize(const RecordedSamplesCallback& decode_callback);
 
   virtual void Record();
   virtual void Stop();
 
   // Cleans up and deletes this object. Do not use object after this call.
   virtual void Finalize();
 
   bool IsRecording();
 
   // Takes ownership of the stream.
@@ skipping 38 matching lines @@
   virtual double ProvideInput(media::AudioBus* dest,
                               base::TimeDelta buffer_delay) override;
 
   // Flushes the audio loop, making sure that any queued operations are
   // performed.
   void FlushAudioLoopForTesting();
 
   bool is_recording_;
 
   media::AudioInputStream* stream_;
-  DecodeSamplesCallback decode_callback_;
+
+  RecordedSamplesCallback decode_callback_;
 
   // ProvideInput will use this buffer as its source.
   const media::AudioBus* temp_conversion_buffer_;
 
   // Outside of the ctor/Initialize method, only access the next variables on
   // the recording thread.
   scoped_ptr<media::AudioBus> buffer_;
   int total_buffer_frames_;
   int buffer_frame_index_;
 
   scoped_ptr<media::AudioConverter> converter_;
 
   scoped_ptr<media::AudioInputStream> input_stream_for_testing_;
   scoped_ptr<media::AudioParameters> params_for_testing_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioRecorder);
 };
 
 }  // namespace copresence
 
 #endif  // COMPONENTS_COPRESENCE_MEDIUMS_AUDIO_AUDIO_RECORDER_H_