Reland of: Separating SCTP code from BaseChannel/MediaChannel.

webrtc/media/BUILD.gn

Index: webrtc/media/BUILD.gn
diff --git a/webrtc/media/BUILD.gn b/webrtc/media/BUILD.gn
index 4ed14138b67e848a58424bf1294b2b34f15589d6..3a6f688eb41af268b7e4e83ea958aca322a48c7c 100644
--- a/webrtc/media/BUILD.gn
+++ b/webrtc/media/BUILD.gn
@@ -143,8 +143,9 @@ rtc_static_library("rtc_media") {
     "engine/webrtcvoe.h",
     "engine/webrtcvoiceengine.cc",
     "engine/webrtcvoiceengine.h",
-    "sctp/sctpdataengine.cc",
-    "sctp/sctpdataengine.h",
+    "sctp/sctptransport.cc",
+    "sctp/sctptransport.h",
+    "sctp/sctptransportinternal.h",
   ]
 
   configs += [ ":rtc_media_warnings_config" ]
@@ -338,7 +339,7 @@ if (rtc_include_tests) {
       "engine/webrtcvideocapturer_unittest.cc",
       "engine/webrtcvideoengine2_unittest.cc",
       "engine/webrtcvoiceengine_unittest.cc",
-      "sctp/sctpdataengine_unittest.cc",
+      "sctp/sctptransport_unittest.cc",
     ]
 
     configs += [ ":rtc_media_unittests_config" ]