Add polling and audio check to copresence.

components/copresence/mediums/audio/audio_manager.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_MANAGER_H_
 #define COMPONENTS_COPRESENCE_MEDIUMS_AUDIO_AUDIO_MANAGER_H_
 
 #include <string>
 
 #include "base/callback.h"
 #include "components/copresence/public/copresence_constants.h"
 
-namespace media {
-class AudioBusRefCounted;
-}
+namespace copresence {
 
-namespace copresence {
+class WhispernetClient;
 
 class AudioManager {
  public:
-  typedef base::Callback<void(const std::string&,
-                              AudioType,
-                              const scoped_refptr<media::AudioBusRefCounted>&)>
-      SamplesCallback;
-  typedef base::Callback<void(const std::string&,
-                              AudioType,
-                              const SamplesCallback&)> EncodeTokenCallback;
-  typedef base::Callback<void(AudioType, const std::string&)>
-      DecodeSamplesCallback;
-
   virtual ~AudioManager() {}
 
   // Initializes the object. Do not use this object before calling this method.
-  virtual void Initialize(const DecodeSamplesCallback& decode_cb,
-                          const EncodeTokenCallback& encode_cb) = 0;
+  virtual void Initialize(WhispernetClient* whispernet_client,
+                          const TokensCallback& tokens_cb) = 0;
 
   virtual void StartPlaying(AudioType type) = 0;
   virtual void StopPlaying(AudioType type) = 0;
 
   virtual void StartRecording(AudioType type) = 0;
   virtual void StopRecording(AudioType type) = 0;
 
   virtual void SetToken(AudioType type,
                         const std::string& url_unsafe_token) = 0;
 
   virtual const std::string GetToken(AudioType type) = 0;
 
   virtual bool IsRecording(AudioType type) = 0;
   virtual bool IsPlaying(AudioType type) = 0;
+
+  virtual bool IsPlayingTokenHeard(AudioType type) = 0;
 };
 
 }  // namespace copresence
 
 #endif  // COMPONENTS_COPRESENCE_MEDIUMS_AUDIO_AUDIO_MANAGER_H_