Increase barback scheduled_test timeout for many_parallel_transformers test.

Increase barback scheduled_test timeout for many_parallel_transformers test.

BUG=dartbug.com/15483

Committed: https://code.google.com/p/dart/source/detail?r=30978

[nweiz, 2013-12-06 19:24:44]

https://codereview.chromium.org/102433007/diff/1/pkg/barback/test/package_gra...
File pkg/barback/test/package_graph/many_parallel_transformers_test.dart
(right):

https://codereview.chromium.org/102433007/diff/1/pkg/barback/test/package_gra...
pkg/barback/test/package_graph/many_parallel_transformers_test.dart:14:
currentSchedule.timeout = new Duration(seconds: 30);
I like to scale the timeouts by doing "currentSchedule.timeout *= 3" or
something like that.

30s is likely too long here; keep in mind that this is the timeout between
asynchronous steps, rather than a global timeout for the test. I'd go with 15s
instead.

[Bill Hesse, 2013-12-09 08:44:05]

Committed patchset #2 manually as r30978 (presubmit successful).

[nweiz, 2013-12-09 21:03:22]

lgtm