While any error listener is attached to an isolate, uncaught errors are reported to the listener through his supplied sendPort.
The current format for the error is
[error.toString(), stack == null ? null : stack.toString()]
This is wrapped on the receiving side.
The isolate exposes the errors as a broadcast stream of error events.
R=floitsch@google.com
Review URL: https://codereview.chromium.org//169703002
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@36290 260f80e4-7a28-3924-810f-c04153c831b5
lrn@google.com