This issue was originally filed by @busybeaver

While working with Dart and WebRTC,

The following code will result in a "NotSupportedError: Internal Dartium Exception" in Darium but works fine in Chrome/dart2j:

RtcPeerConnection peer1 = new RtcPeerConnection(/.../);
RtcPeerConnection peer2 = new RtcPeerConnection(/.../);
peer1.onIceCandidate.listen((RtcIceCandidateEvent e) {
  if (e.candidate != null) {
    peer2.addIceCandidate(e.candidate, () => print('void: $e'), (var x) => print('FailureCallback: $e'));
  }
});

I also attached a very simple WebRTC example. Just create a new Dart web application and use the webrtctest.dart file.

The expected output (as seen in Chrome) is a "first text message over RTP data ports" console message. It seems like I'm not the only one with this problem: http://stackoverflow.com/q/19896137

Also, it seems odd that a public method like 'addIceCandidate' uses as last parameter a private "_RtcErrorCallback" object: http://api.dartlang.org/docs/releases/latest/dart_html/RtcPeerConnection.html#addIceCandidate

Below the information about Chrome, Dartium, and the operation system...

Dartium Version Stats:

Chromium 31.0.1650.39 (Developer Build 1593)
OS Mac OS X
Blink 537.36 (@­1589)
JavaScript V8 3.21.18.2
Dart 0.8.10.10_r30104
Flash 11.9.900.117
User Agent Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.39 (Dart) Safari/537.36
Command Line /Applications/dart/chromium/Chromium.app/Contents/MacOS/Chromium --remote-debugging-port=59951 --user-data-dir=/Users//.dartium --enable-experimental-webkit-features --enable-devtools-experiments --no-first-run --no-default-browser-check --no-process-singleton-dialog --flag-switches-begin --flag-switches-end chrome://version/
Executable Path /Applications/dart/chromium/Chromium.app/Contents/MacOS/Chromium
Profile Path /Users//.dartium/Default

Chrome Version Stats:

Google Chrome 30.0.1599.101 (Official Build 227552)
OS Mac OS X
Blink 537.36 (@­159105)
JavaScript V8 3.20.17.15
Flash 11.9.900.117
User Agent Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/30.0.1599.101 Safari/537.36
Command Line /Applications/Google Chrome.app/Contents/MacOS/Google Chrome -psn_0_7300854 --flag-switches-begin --enable-accelerated-filters --no-pings --flag-switches-end
Executable Path /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
Profile Path /Users/***/Library/Application Support/Google/Chrome/Default

OS:

Darwin ***.de 11.4.2 Darwin Kernel Version 11.4.2: Thu Aug 23 16:25:48 PDT 2012; root:xnu-1699.32.7~1/RELEASE_X86_64 x86_64

Attachment:
webrtctest.dart (2.46 KB)