Remove unused "crypto_options_" field.

webrtc/pc/channelmanager.cc

 /*
  *  Copyright 2004 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 35 matching lines @@
                                rtc::Thread* worker_thread,
                                rtc::Thread* network_thread) {
   media_engine_ = std::move(me);
   data_media_engine_ = std::move(dme);
   initialized_ = false;
   main_thread_ = rtc::Thread::Current();
   worker_thread_ = worker_thread;
   network_thread_ = network_thread;
   capturing_ = false;
   enable_rtx_ = false;
-  crypto_options_ = rtc::CryptoOptions::NoGcm();
 }
 
 ChannelManager::~ChannelManager() {
   if (initialized_) {
     Terminate();
     // If srtp is initialized (done by the Channel) then we must call
     // srtp_shutdown to free all crypto kernel lists. But we need to make sure
     // shutdown always called at the end, after channels are destroyed.
     // ChannelManager d'tor is always called last, it's safe place to call
     // shutdown.
@@ skipping 383 matching lines @@
                           media_engine_.get(), file, max_size_bytes));
 }
 
 void ChannelManager::StopAecDump() {
   worker_thread_->Invoke<void>(
       RTC_FROM_HERE,
       Bind(&MediaEngineInterface::StopAecDump, media_engine_.get()));
 }
 
 }  // namespace cricket