Support RTCConfiguration iceTransportPolicy

third_party/WebKit/Source/modules/peerconnection/RTCConfiguration.idl

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // https://w3c.github.io/webrtc-pc/#rtcicetransportpolicy-enum
 
 // TODO(foolip): This is called RTCIceTransportPolicy in the spec, and that enum
 // does not have "none" as one of its values.
 enum RTCIceTransports {
     "none",
@@ skipping 13 matching lines @@
 
 enum RTCRtcpMuxPolicy {
     "negotiate",
     "require"
 };
 
 // https://w3c.github.io/webrtc-pc/#rtcconfiguration-dictionary
 
 dictionary RTCConfiguration {
     sequence<RTCIceServer> iceServers;
-    // TODO(foolip): |iceTransports| should be |iceTransportPolicy|.
-    RTCIceTransports iceTransports = "all";
+    // TODO(foolip): |iceTransportPolicy| default should be "all", but it is
+    // omitted to allow fallback to |iceTransports| if not specified.
+    RTCIceTransports iceTransportPolicy;
+    // TODO(foolip): |iceTransports| is not in the spec.
+    RTCIceTransports iceTransports;
     RTCBundlePolicy bundlePolicy = "balanced";
     // TODO(foolip): |rtcpMuxPolicy| default should be "require".
     RTCRtcpMuxPolicy rtcpMuxPolicy;
     // TODO(foolip): DOMString peerIdentity;
     // TODO(foolip): |certificates| should not be nullable.
     sequence<RTCCertificate>? certificates;
     // TODO(foolip): unsigned short iceCandidatePoolSize = 0;
 };