Replace MediaContentDirection with RtpTransceiverDirection

Bug: webrtc:8558
Change-Id: I410d17cce235e0b42038cf0b125fd916010f50ae
Reviewed-on: https://webrtc-review.googlesource.com/24745
Commit-Queue: Steve Anton <steveanton@webrtc.org>
Reviewed-by: Peter Thatcher <pthatcher@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20922}
diff --git a/pc/webrtcsdp.cc b/pc/webrtcsdp.cc
index 8101a70..63265cd 100644
--- a/pc/webrtcsdp.cc
+++ b/pc/webrtcsdp.cc
@@ -1466,16 +1466,16 @@
   // RFC 3264
   // a=sendrecv || a=sendonly || a=sendrecv || a=inactive
   switch (media_desc->direction()) {
-    case cricket::MD_INACTIVE:
+    case RtpTransceiverDirection::kInactive:
       InitAttrLine(kAttributeInactive, &os);
       break;
-    case cricket::MD_SENDONLY:
+    case RtpTransceiverDirection::kSendOnly:
       InitAttrLine(kAttributeSendOnly, &os);
       break;
-    case cricket::MD_RECVONLY:
+    case RtpTransceiverDirection::kRecvOnly:
       InitAttrLine(kAttributeRecvOnly, &os);
       break;
-    case cricket::MD_SENDRECV:
+    case RtpTransceiverDirection::kSendRecv:
     default:
       InitAttrLine(kAttributeSendRecv, &os);
       break;
@@ -2880,13 +2880,13 @@
           return false;
         }
       } else if (HasAttribute(line, kAttributeSendOnly)) {
-        media_desc->set_direction(cricket::MD_SENDONLY);
+        media_desc->set_direction(RtpTransceiverDirection::kSendOnly);
       } else if (HasAttribute(line, kAttributeRecvOnly)) {
-        media_desc->set_direction(cricket::MD_RECVONLY);
+        media_desc->set_direction(RtpTransceiverDirection::kRecvOnly);
       } else if (HasAttribute(line, kAttributeInactive)) {
-        media_desc->set_direction(cricket::MD_INACTIVE);
+        media_desc->set_direction(RtpTransceiverDirection::kInactive);
       } else if (HasAttribute(line, kAttributeSendRecv)) {
-        media_desc->set_direction(cricket::MD_SENDRECV);
+        media_desc->set_direction(RtpTransceiverDirection::kSendRecv);
       } else if (HasAttribute(line, kAttributeExtmap)) {
         RtpExtension extmap;
         if (!ParseExtmap(line, &extmap, error)) {