Add support for GCM cipher suites from RFC 7714.

talk/app/webrtc/peerconnectionfactory.cc

 /*
  * libjingle
  * Copyright 2004--2011 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 183 matching lines @@
   // TODO:  Need to make sure only one VoE is created inside
   // WebRtcMediaEngine.
   cricket::MediaEngineInterface* media_engine =
       worker_thread_->Invoke<cricket::MediaEngineInterface*>(rtc::Bind(
       &PeerConnectionFactory::CreateMediaEngine_w, this));
 
   channel_manager_.reset(
       new cricket::ChannelManager(media_engine, worker_thread_));
 
   channel_manager_->SetVideoRtxEnabled(true);
+  channel_manager_->SetEnableGcmCryptoSuites(options_.enable_gcm_crypto_suites);
   if (!channel_manager_->Init()) {
     return false;
   }
 
   dtls_identity_store_ = new RefCountedDtlsIdentityStore(
       signaling_thread_, worker_thread_);
 
   return true;
 }
 
+void PeerConnectionFactory::SetOptions(const Options& options) {
+  options_ = options;
+  if (channel_manager_) {
+    channel_manager_->SetEnableGcmCryptoSuites(
+        options.enable_gcm_crypto_suites);
+  }
+}
+
 rtc::scoped_refptr<AudioSourceInterface>
 PeerConnectionFactory::CreateAudioSource(
     const MediaConstraintsInterface* constraints) {
   RTC_DCHECK(signaling_thread_->IsCurrent());
   rtc::scoped_refptr<LocalAudioSource> source(
       LocalAudioSource::Create(options_, constraints));
   return source;
 }
 
 rtc::scoped_refptr<VideoSourceInterface>
@@ skipping 139 matching lines @@
 }
 
 cricket::MediaEngineInterface* PeerConnectionFactory::CreateMediaEngine_w() {
   ASSERT(worker_thread_ == rtc::Thread::Current());
   return cricket::WebRtcMediaEngineFactory::Create(
       default_adm_.get(), video_encoder_factory_.get(),
       video_decoder_factory_.get());
 }
 
 }  // namespace webrtc