Reland of: Separating SCTP code from BaseChannel/MediaChannel.

webrtc/api/test/mock_webrtcsession.h

Index: webrtc/api/test/mock_webrtcsession.h
diff --git a/webrtc/api/test/mock_webrtcsession.h b/webrtc/api/test/mock_webrtcsession.h
index 7fefad857d8883f495fde1133f5d891b086f9dd9..ae750356081891aee619870ea1b605dd58983f9e 100644
--- a/webrtc/api/test/mock_webrtcsession.h
+++ b/webrtc/api/test/mock_webrtcsession.h
@@ -15,6 +15,7 @@
 #include <string>
 
 #include "webrtc/api/webrtcsession.h"
+#include "webrtc/media/sctp/sctptransportinternal.h"
 #include "webrtc/test/gmock.h"
 
 namespace webrtc {
@@ -35,7 +36,8 @@ class MockWebRtcSession : public webrtc::WebRtcSession {
             std::unique_ptr<cricket::TransportController>(
                 new cricket::TransportController(rtc::Thread::Current(),
                                                  rtc::Thread::Current(),
-                                                 nullptr))) {}
+                                                 nullptr)),
+            std::unique_ptr<cricket::SctpTransportInternalFactory>()) {}
   MOCK_METHOD0(voice_channel, cricket::VoiceChannel*());
   MOCK_METHOD0(video_channel, cricket::VideoChannel*());
   // Libjingle uses "local" for a outgoing track, and "remote" for a incoming