Ensure that failure to start an isolate all end up in the future.

Ensure that failure to start an isolate all end up in the future.

Isolate.spawnUri can fail in many ways.
Any problem that prevents calling "main" on a loaded isolate
should end up as IsolateSpawnException in the future returned by
Isolate.spawnUri.

This CL ensures that failure to look up main is handled correctly,
and adds more tests.

R=sgjesse@google.com

Committed: https://code.google.com/p/dart/source/detail?r=36982

[Lasse Reichstein Nielsen, 2014-05-28 09:10:41]

PTAL

[Søren Gjesse, 2014-05-28 12:00:41]

lgtm

https://codereview.chromium.org/297413002/diff/20001/tests/isolate/isolate_cr...
File tests/isolate/isolate_create_error_test.dart (right):

https://codereview.chromium.org/297413002/diff/20001/tests/isolate/isolate_cr...
tests/isolate/isolate_create_error_test.dart:35: result.then(badSuccess,
onError: (IsolateSpawnException e) {
Add an expectation for e instead of print (in all tests)?

[Lasse Reichstein Nielsen, 2014-06-04 08:42:52]

Committed patchset #4 manually as r36982 (presubmit successful).

[Lasse Reichstein Nielsen, 2014-06-04 10:01:24]

Reverted. Some tests fails on the bot that don't fail locally.