Add polling and audio check to copresence.

components/copresence/mediums/audio/audio_manager.h

Index: components/copresence/mediums/audio/audio_manager.h
diff --git a/components/copresence/mediums/audio/audio_manager.h b/components/copresence/mediums/audio/audio_manager.h
index 59ad3a3fb134820325f96bf74216b9cf5289f065..5d302adc9e307ea99307cd95f37f6101b8785fe4 100644
--- a/components/copresence/mediums/audio/audio_manager.h
+++ b/components/copresence/mediums/audio/audio_manager.h
@@ -10,29 +10,17 @@
 #include "base/callback.h"
 #include "components/copresence/public/copresence_constants.h"
 
-namespace media {
-class AudioBusRefCounted;
-}
-
 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;
@@ -47,6 +35,8 @@ class AudioManager {
 
   virtual bool IsRecording(AudioType type) = 0;
   virtual bool IsPlaying(AudioType type) = 0;
+
+  virtual bool IsPlayingTokenHeard(AudioType type) = 0;
 };
 
 }  // namespace copresence