Stop playing/recording when not needed.

components/copresence/handlers/directive_handler.h

Index: components/copresence/handlers/directive_handler.h
diff --git a/components/copresence/handlers/directive_handler.h b/components/copresence/handlers/directive_handler.h
index 2dd6a8863d068b66ac48cb9a296dc4899f93f5a5..081b62efd253dc887aa0847417eae2ff6db58182 100644
--- a/components/copresence/handlers/directive_handler.h
+++ b/components/copresence/handlers/directive_handler.h
@@ -10,12 +10,11 @@
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
-#include "components/copresence/handlers/audio/audio_directive_list.h"
+#include "components/copresence/handlers/audio/audio_directive_handler.h"
 #include "components/copresence/mediums/audio/audio_recorder.h"
 
 namespace copresence {
 
-class AudioDirectiveHandler;
 class Directive;
 
 // The directive handler manages transmit and receive directives
@@ -31,13 +30,16 @@ class DirectiveHandler {
   //               and make the constructor private.
   virtual void Initialize(
       const AudioRecorder::DecodeSamplesCallback& decode_cb,
-      const AudioDirectiveList::EncodeTokenCallback& encode_cb);
+      const AudioDirectiveHandler::EncodeTokenCallback& encode_cb);
 
   // Adds a directive to handle.
   virtual void AddDirective(const copresence::Directive& directive);
   // Removes any directives associated with the given operation id.
   virtual void RemoveDirectives(const std::string& op_id);
 
+  const std::string& CurrentAudibleToken() const;
+  const std::string& CurrentInaudibleToken() const;
+
  private:
   scoped_ptr<AudioDirectiveHandler> audio_handler_;