Add polling and audio check to copresence.

components/copresence/handlers/audio/audio_directive_handler_impl.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_HANDLERS_AUDIO_AUDIO_DIRECTIVE_HANDLER_IMPL_H_
 #define COMPONENTS_COPRESENCE_HANDLERS_AUDIO_AUDIO_DIRECTIVE_HANDLER_IMPL_H_
 
 #include <string>
 
 #include "base/macros.h"
@@ skipping 25 matching lines @@
 // of this class.
 class AudioDirectiveHandlerImpl final : public AudioDirectiveHandler {
  public:
   AudioDirectiveHandlerImpl();
   AudioDirectiveHandlerImpl(scoped_ptr<AudioManager> audio_manager,
                             scoped_ptr<base::Timer> timer,
                             const scoped_refptr<TickClockRefCounted>& clock);
 
   ~AudioDirectiveHandlerImpl();
 
-  // Do not use this class before calling this.
-  void Initialize(const AudioManager::DecodeSamplesCallback& decode_cb,
-                  const AudioManager::EncodeTokenCallback& encode_cb) override;
-
-  // Adds an instruction to our handler. The instruction will execute and be
-  // removed after the ttl expires.
+  // AudioDirectiveHandler overrides:
+  void Initialize(WhispernetClient* whispernet_client,
+                  const TokensCallback& tokens_cb) override;
   void AddInstruction(const copresence::TokenInstruction& instruction,
                       const std::string& op_id,
                       base::TimeDelta ttl_ms) override;
-
-  // Removes all instructions associated with this operation id.
   void RemoveInstructions(const std::string& op_id) override;
-
-  // Returns the currently playing token.
   const std::string PlayingToken(AudioType type) const override;
+  bool IsPlayingTokenHeard(AudioType type) const override;
 
  private:
   // Processes the next active instruction,
   // updating our audio manager state accordingly.
   void ProcessNextInstruction();
 
   // Returns the time that an instruction expires at. This will always return
   // the earliest expiry time among all the active receive and transmit
   // instructions. If we don't have any active instructions, returns false.
   bool GetNextInstructionExpiry(base::TimeTicks* next_event);
 
   scoped_ptr<AudioManager> audio_manager_;
 
   scoped_ptr<base::Timer> audio_event_timer_;
   scoped_refptr<TickClockRefCounted> clock_;
 
   // Lists of transmits and receives, for both audible and inaudible tokens.
   // AUDIBLE = element 0, INAUDIBLE = element 1 (see copresence_constants.h).
   ScopedVector<AudioDirectiveList> transmits_lists_;
   ScopedVector<AudioDirectiveList> receives_lists_;
 
 
   DISALLOW_COPY_AND_ASSIGN(AudioDirectiveHandlerImpl);
 };
 
 }  // namespace copresence
 
 #endif  // COMPONENTS_COPRESENCE_HANDLERS_AUDIO_AUDIO_DIRECTIVE_HANDLER_IMPL_H_