Remove [TreatNullAs=NullString] from attributes on RTCIceCandidate

third_party/WebKit/Source/modules/mediastream/RTCIceCandidate.idl

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 15 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 [
     GarbageCollected,
     Constructor(RTCIceCandidateInit candidateInitDict),
     RaisesException=Constructor
 ] interface RTCIceCandidate {
-    [TreatNullAs=NullString] attribute DOMString candidate;
-    [TreatNullAs=NullString] attribute DOMString sdpMid;
+    attribute DOMString candidate;
+    attribute DOMString sdpMid;
     attribute unsigned short sdpMLineIndex;
     serializer = {attribute};
 };