Support encrypted RTP extensions (RFC 6904)

webrtc/base/sslstreamadapter.h

Index: webrtc/base/sslstreamadapter.h
diff --git a/webrtc/base/sslstreamadapter.h b/webrtc/base/sslstreamadapter.h
index e1d1d852156786f5e84e202574ba4dae50a3ed1c..ef27fcf2441b5af8da2ee784cd75c5355b8b3eae 100644
--- a/webrtc/base/sslstreamadapter.h
+++ b/webrtc/base/sslstreamadapter.h
@@ -80,6 +80,10 @@ struct CryptoOptions {
   // Enable GCM crypto suites from RFC 7714 for SRTP. GCM will only be used
   // if both sides enable it.
   bool enable_gcm_crypto_suites = false;
+
+  // If set to true, encrypted RTP header extensions as defined in RFC 6904
+  // will be negotiated. They will be only used if both peers support them.
+  bool enable_encrypted_rtp_header_extensions = false;
 };
 
 // SSLStreamAdapter : A StreamInterfaceAdapter that does SSL/TLS.