Redesign the copresence audio handlers.

components/copresence/mediums/audio/audio_recorder_impl.h

Index: components/copresence/mediums/audio/audio_recorder_impl.h
diff --git a/components/copresence/mediums/audio/audio_recorder.h b/components/copresence/mediums/audio/audio_recorder_impl.h
similarity index 75%
copy from components/copresence/mediums/audio/audio_recorder.h
copy to components/copresence/mediums/audio/audio_recorder_impl.h
index 5c68eca1808b5c064be2f6426514559186b0adc8..b14edb3023c52057048cd91e86c90ad1ed35fdd9 100644
--- a/components/copresence/mediums/audio/audio_recorder.h
+++ b/components/copresence/mediums/audio/audio_recorder_impl.h
@@ -2,14 +2,15 @@
 // 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_
+#ifndef COMPONENTS_COPRESENCE_MEDIUMS_AUDIO_AUDIO_RECORDER_IMPL_H_
+#define COMPONENTS_COPRESENCE_MEDIUMS_AUDIO_AUDIO_RECORDER_IMPL_H_
 
 #include <string>
 
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
+#include "components/copresence/mediums/audio/audio_recorder.h"
 #include "media/audio/audio_io.h"
 #include "media/audio/audio_parameters.h"
 #include "media/base/audio_converter.h"
@@ -25,23 +26,22 @@ class AudioBus;
 namespace copresence {
 
 // The AudioRecorder class will record audio until told to stop.
-class AudioRecorder : public media::AudioInputStream::AudioInputCallback,
-                      public media::AudioConverter::InputCallback {
+class AudioRecorderImpl final
+    : public 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);
+  AudioRecorderImpl();
 
-  // Initializes the object. Do not use this object before calling this method.
-  virtual void Initialize();
-
-  virtual void Record();
-  virtual void Stop();
-
-  // Cleans up and deletes this object. Do not use object after this call.
-  virtual void Finalize();
-
-  bool IsRecording();
+  // AudioRecorder overrides:
+  virtual void Initialize(
+      const RecordedSamplesCallback& decode_callback) override;
+  virtual void Record() override;
+  virtual void Stop() override;
+  virtual void Finalize() override;
+  virtual bool IsRecording() override;
 
   // Takes ownership of the stream.
   void set_input_stream_for_testing(
@@ -55,7 +55,7 @@ class AudioRecorder : public media::AudioInputStream::AudioInputCallback,
   }
 
  protected:
-  virtual ~AudioRecorder();
+  virtual ~AudioRecorderImpl();
   void set_is_recording(bool is_recording) { is_recording_ = is_recording; }
 
  private:
@@ -92,7 +92,8 @@ class AudioRecorder : public media::AudioInputStream::AudioInputCallback,
   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_;
@@ -108,9 +109,9 @@ class AudioRecorder : public media::AudioInputStream::AudioInputCallback,
   scoped_ptr<media::AudioInputStream> input_stream_for_testing_;
   scoped_ptr<media::AudioParameters> params_for_testing_;
 
-  DISALLOW_COPY_AND_ASSIGN(AudioRecorder);
+  DISALLOW_COPY_AND_ASSIGN(AudioRecorderImpl);
 };
 
 }  // namespace copresence
 
-#endif  // COMPONENTS_COPRESENCE_MEDIUMS_AUDIO_AUDIO_RECORDER_H_
+#endif  // COMPONENTS_COPRESENCE_MEDIUMS_AUDIO_AUDIO_RECORDER_IMPL_H_