Merging definitions of IsSctp.

Cr-Commit-Position: refs/heads/master@{#8482}
git-svn-id: http://webrtc.googlecode.com/svn/trunk@8482 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/talk/app/webrtc/webrtcsdp.cc b/talk/app/webrtc/webrtcsdp.cc
index 889fe89..908b11d 100644
--- a/talk/app/webrtc/webrtcsdp.cc
+++ b/talk/app/webrtc/webrtcsdp.cc
@@ -1827,7 +1827,8 @@
 
 bool IsDtlsSctp(const std::string& protocol) {
   // This intentionally excludes "SCTP" and "SCTP/DTLS".
-  return protocol.find(cricket::kMediaProtocolDtlsSctp) != std::string::npos;
+  return protocol.find(cricket::kMediaProtocolDtlsSctp) != std::string::npos
+    || protocol.find(cricket::kMediaProtocolUdpDtlsSctp) != std::string::npos;
 }
 
 bool ParseSessionDescription(const std::string& message, size_t* pos,