Making all callbacks use zones (take 2)

tools/dom/templates/html/impl/impl_RTCPeerConnection.darttemplate

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of $LIBRARYNAME;
 
 $(ANNOTATIONS)$(CLASS_MODIFIERS)class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
 $if DART2JS
   factory $CLASSNAME(Map rtcIceServers, [Map mediaConstraints]) {
     var constructorName = JS('RtcPeerConnection', 'window[#]',
@@ skipping 37 matching lines @@
     return completer.future;
   }
 
   Future<RtcSessionDescription> createAnswer([Map mediaConstraints]) {
     var completer = new Completer<RtcSessionDescription>();
     _createAnswer(
         (value) { completer.complete(value); },
         (error) { completer.completeError(error); }, mediaConstraints);
     return completer.future;
   }
+
+  @DomName('RTCPeerConnection.getStats')
+  Future<RtcStatsResponse> getStats(MediaStreamTrack selector) {
+    var completer = new Completer<RtcStatsResponse>();
+    _getStats((value) { completer.complete(value); }, selector);
+    return completer.future;
+  }
 $!MEMBERS
 }