Accept all the media profiles required by JSEP.

webrtc/pc/mediasession.cc

Index: webrtc/pc/mediasession.cc
diff --git a/webrtc/pc/mediasession.cc b/webrtc/pc/mediasession.cc
index a9d1b95c22aee6aae9299315a9ecc05586242336..3905655900f16d1588cfd8d538d90177fb10e430 100644
--- a/webrtc/pc/mediasession.cc
+++ b/webrtc/pc/mediasession.cc
@@ -57,6 +57,13 @@ const char kMediaProtocolAvpf[] = "RTP/AVPF";
 // RFC5124
 const char kMediaProtocolDtlsSavpf[] = "UDP/TLS/RTP/SAVPF";
 
+// The accepted pattern for media protocol (JSEP Section 5.1.3)
+const std::vector<std::string> kMediaProtocols = {"RTP/SAVPF", "RTP/SAVP",
+                                                  "RTP/AVPF", "RTP/AVP"};
+const std::vector<std::string> kMediaProtocolsDtls = {
+    "UDP/TLS/RTP/SAVPF", "UDP/TLS/RTP/SAVP", "TCP/TLS/RTP/SAVPF",
+    "TCP/TLS/RTP/SAVP"};
+
 // We always generate offers with "UDP/TLS/RTP/SAVPF" when using DTLS-SRTP,
 // but we tolerate "RTP/SAVPF" in offers we receive, for compatibility.
 const char kMediaProtocolSavpf[] = "RTP/SAVPF";
@@ -1105,6 +1112,12 @@ static bool CreateMediaContentAnswer(
   return true;
 }
 
+static bool IsProtocolFound(const std::vector<std::string> protocol_vec,
+                            const std::string& protocol) {
+  return std::find(protocol_vec.begin(), protocol_vec.end(), protocol) !=
+         protocol_vec.end();
+}
+
 static bool IsMediaProtocolSupported(MediaType type,
                                      const std::string& protocol,
                                      bool secure_transport) {
@@ -1117,9 +1130,8 @@ static bool IsMediaProtocolSupported(MediaType type,
 
   // Since not all applications serialize and deserialize the media protocol,
   // we will have to accept |protocol| to be empty.
-  return protocol == kMediaProtocolAvpf || protocol.empty() ||
-      protocol == kMediaProtocolSavpf ||
-      (protocol == kMediaProtocolDtlsSavpf && secure_transport);
+  return protocol.empty() || IsProtocolFound(kMediaProtocols, protocol) ||
+         (IsProtocolFound(kMediaProtocolsDtls, protocol) && secure_transport);
 }
 
 static void SetMediaProtocol(bool secure_transport,