Add support for GCM cipher suites from RFC 7714.

webrtc/pc/channelmanager.h

 /*
  *  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 107 matching lines @@
 
   // Indicates whether any channels exist.
   bool has_channels() const {
     return (!voice_channels_.empty() || !video_channels_.empty());
   }
 
   // RTX will be enabled/disabled in engines that support it. The supporting
   // engines will start offering an RTX codec. Must be called before Init().
   bool SetVideoRtxEnabled(bool enable);
 
+  // Define crypto options to set on newly created channels. Doesn't change
+  // options on already created channels.
+  bool SetCryptoOptions(const rtc::CryptoOptions& crypto_options);
+
   // Starts/stops the local microphone and enables polling of the input level.
   bool capturing() const { return capturing_; }
 
   // The operations below occur on the main thread.
 
   // Starts AEC dump using existing file, with a specified maximum file size in
   // bytes. When the limit is reached, logging will stop and the file will be
   // closed. If max_size_bytes is set to <= 0, no limit will be used.
   bool StartAecDump(rtc::PlatformFile file, int64_t max_size_bytes);
 
   // Stops recording AEC dump.
   void StopAecDump();
 
  private:
   typedef std::vector<VoiceChannel*> VoiceChannels;
   typedef std::vector<VideoChannel*> VideoChannels;
   typedef std::vector<DataChannel*> DataChannels;
 
   void Construct(MediaEngineInterface* me,
                  DataEngineInterface* dme,
                  rtc::Thread* worker_thread,
                  rtc::Thread* network_thread);
   bool InitMediaEngine_w();
   void DestructorDeletes_w();
   void Terminate_w();
+  bool SetCryptoOptions_w(const rtc::CryptoOptions& crypto_options);
   VoiceChannel* CreateVoiceChannel_w(
       webrtc::MediaControllerInterface* media_controller,
       TransportController* transport_controller,
       const std::string& content_name,
       const std::string* bundle_transport_name,
       bool rtcp,
       const AudioOptions& options);
   void DestroyVoiceChannel_w(VoiceChannel* voice_channel);
   VideoChannel* CreateVideoChannel_w(
       webrtc::MediaControllerInterface* media_controller,
@@ skipping 15 matching lines @@
   bool initialized_;
   rtc::Thread* main_thread_;
   rtc::Thread* worker_thread_;
   rtc::Thread* network_thread_;
 
   VoiceChannels voice_channels_;
   VideoChannels video_channels_;
   DataChannels data_channels_;
 
   bool enable_rtx_;
+  rtc::CryptoOptions crypto_options_;
 
   bool capturing_;
 };
 
 }  // namespace cricket
 
 #endif  // WEBRTC_PC_CHANNELMANAGER_H_