Add audible support to the copresence API.

components/copresence/handlers/audio/audio_directive_handler.h

Index: components/copresence/handlers/audio/audio_directive_handler.h
diff --git a/components/copresence/handlers/audio/audio_directive_handler.h b/components/copresence/handlers/audio/audio_directive_handler.h
index a6ffa39bbf7bd0edadac65fab50d2fa9279062f6..19eae85e5520319040365e61d1fb80d2073bd54d 100644
--- a/components/copresence/handlers/audio/audio_directive_handler.h
+++ b/components/copresence/handlers/audio/audio_directive_handler.h
@@ -56,7 +56,8 @@ class AudioDirectiveHandler {
   // Execute the next active receive instruction.
   void ExecuteNextReceive();
 
-  AudioDirectiveList directive_list_;
+  AudioDirectiveList directive_list_inaudible_;

[Charlie, 2014/08/08 22:24:14]

Call them just inaudible_directives_ and audible_directives_

[rkc, 2014/08/09 06:58:54]

That is an incorrect description. These aren't inaudible directives but rather
directives that use inaudible audio.

+  AudioDirectiveList directive_list_audible_;
 
   // The next two pointers are self-deleting. When we call Finalize on them,
   // they clean themselves up on the Audio thread.