Support encrypted RTP extensions (RFC 6904)

webrtc/p2p/base/fakedtlstransport.h

Index: webrtc/p2p/base/fakedtlstransport.h
diff --git a/webrtc/p2p/base/fakedtlstransport.h b/webrtc/p2p/base/fakedtlstransport.h
index 9d5859c4dd51a8c7c968c69a940b35459cc8f505..dba3cbf6c1558673fddd2651a7b754d5b468b2ac 100644
--- a/webrtc/p2p/base/fakedtlstransport.h
+++ b/webrtc/p2p/base/fakedtlstransport.h
@@ -122,6 +122,12 @@ class FakeDtlsTransport : public DtlsTransportInternal {
     *role = ssl_role_;
     return true;
   }
+  const rtc::CryptoOptions& crypto_options() const override {
+    return crypto_options_;
+  }
+  void SetCryptoOptions(const rtc::CryptoOptions& crypto_options) {
+    crypto_options_ = crypto_options;
+  }
   bool SetLocalCertificate(
       const rtc::scoped_refptr<rtc::RTCCertificate>& certificate) override {
     local_cert_ = certificate;
@@ -135,9 +141,12 @@ class FakeDtlsTransport : public DtlsTransportInternal {
     if (!do_dtls_) {
       return false;
     }
-    *crypto_suite = rtc::SRTP_AES128_CM_SHA1_80;
+    *crypto_suite = crypto_suite_;
     return true;
   }
+  void SetSrtpCryptoSuite(int crypto_suite) {
+    crypto_suite_ = crypto_suite;
+  }
   bool GetSslCipherSuite(int* cipher_suite) override { return false; }
   rtc::scoped_refptr<rtc::RTCCertificate> GetLocalCertificate() const override {
     return local_cert_;
@@ -230,6 +239,8 @@ class FakeDtlsTransport : public DtlsTransportInternal {
   rtc::SSLProtocolVersion ssl_max_version_ = rtc::SSL_PROTOCOL_DTLS_12;
   rtc::SSLFingerprint dtls_fingerprint_;
   rtc::SSLRole ssl_role_ = rtc::SSL_CLIENT;
+  int crypto_suite_ = rtc::SRTP_AES128_CM_SHA1_80;
+  rtc::CryptoOptions crypto_options_;
 
   DtlsTransportState dtls_state_ = DTLS_TRANSPORT_NEW;