Refactor handling of AudioOptions.

talk/media/base/mediachannel.h

 /*
  * libjingle
  * Copyright 2004 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 535 matching lines @@
 
   // |network_interface_| can be accessed from the worker_thread and
   // from any MediaEngine threads. This critical section is to protect accessing
   // of network_interface_ object.
   rtc::CriticalSection network_interface_crit_;
   NetworkInterface* network_interface_;
 };
 
 enum SendFlags {
   SEND_NOTHING,
-  SEND_RINGBACKTONE,
   SEND_MICROPHONE
 };
 
 // The stats information is structured as follows:
 // Media are represented by either MediaSenderInfo or MediaReceiverInfo.
 // Media contains a vector of SSRC infos that are exclusively used by this
 // media. (SSRCs shared between media streams can't be represented.)
 
 // Information about an SSRC.
 // This data may be locally recorded, or received in an RTCP SR or RR.
@@ skipping 637 matching lines @@
   // Signal when the media channel is ready to send the stream. Arguments are:
   //     writable(bool)
   sigslot::signal1<bool> SignalReadyToSend;
   // Signal for notifying that the remote side has closed the DataChannel.
   sigslot::signal1<uint32_t> SignalStreamClosedRemotely;
 };
 
 }  // namespace cricket
 
 #endif  // TALK_MEDIA_BASE_MEDIACHANNEL_H_