Add support for GCM cipher suites from RFC 7714.

webrtc/pc/mediasession.h

Index: webrtc/pc/mediasession.h
diff --git a/webrtc/pc/mediasession.h b/webrtc/pc/mediasession.h
index 6ac74f2d335dadca819b3c4acfca7209de7a6bb1..1211e7b9e9c12cfa0d7183748f4ac1134e7a6d00 100644
--- a/webrtc/pc/mediasession.h
+++ b/webrtc/pc/mediasession.h
@@ -131,6 +131,7 @@ struct MediaSessionOptions {
   // bps. -1 == auto.
   int video_bandwidth;
   int data_bandwidth;
+  rtc::CryptoOptions crypto_options;
   // content name ("mid") => options.
   std::map<std::string, TransportOptions> transport_options;
 
@@ -529,17 +530,21 @@ const VideoContentDescription* GetFirstVideoContentDescription(
 const DataContentDescription* GetFirstDataContentDescription(
     const SessionDescription* sdesc);
 
-void GetSupportedAudioCryptoSuites(std::vector<int>* crypto_suites);
-void GetSupportedVideoCryptoSuites(std::vector<int>* crypto_suites);
-void GetSupportedDataCryptoSuites(std::vector<int>* crypto_suites);
-void GetDefaultSrtpCryptoSuites(std::vector<int>* crypto_suites);
-void GetSupportedAudioCryptoSuiteNames(
+void GetSupportedAudioCryptoSuites(const rtc::CryptoOptions& crypto_options,
+    std::vector<int>* crypto_suites);
+void GetSupportedVideoCryptoSuites(const rtc::CryptoOptions& crypto_options,
+    std::vector<int>* crypto_suites);
+void GetSupportedDataCryptoSuites(const rtc::CryptoOptions& crypto_options,
+    std::vector<int>* crypto_suites);
+void GetDefaultSrtpCryptoSuites(const rtc::CryptoOptions& crypto_options,
+    std::vector<int>* crypto_suites);
+void GetSupportedAudioCryptoSuiteNames(const rtc::CryptoOptions& crypto_options,
     std::vector<std::string>* crypto_suite_names);
-void GetSupportedVideoCryptoSuiteNames(
+void GetSupportedVideoCryptoSuiteNames(const rtc::CryptoOptions& crypto_options,
     std::vector<std::string>* crypto_suite_names);
-void GetSupportedDataCryptoSuiteNames(
+void GetSupportedDataCryptoSuiteNames(const rtc::CryptoOptions& crypto_options,
     std::vector<std::string>* crypto_suite_names);
-void GetDefaultSrtpCryptoSuiteNames(
+void GetDefaultSrtpCryptoSuiteNames(const rtc::CryptoOptions& crypto_options,
     std::vector<std::string>* crypto_suite_names);
 
 }  // namespace cricket