Split barback's transform_test into multiple smaller test files.

Split barback's transform_test into multiple smaller test files.

R=rnystrom@google.com
BUG=

Committed: https://code.google.com/p/dart/source/detail?r=33135

[Bob Nystrom, 2014-02-27 22:04:35]

I assume the code is the same so I just skimmed. LGTM!

https://codereview.chromium.org/182313012/diff/1/pkg/barback/test/package_gra...
File pkg/barback/test/package_graph/transform/concurrency_test.dart (right):

https://codereview.chromium.org/182313012/diff/1/pkg/barback/test/package_gra...
pkg/barback/test/package_graph/transform/concurrency_test.dart:6: // happening
concurrently or other complex asynchronous timing behavior.
Doc comment.

[nweiz, 2014-02-27 22:13:17]

Yes, all the tests are the same, just reorganized.

https://codereview.chromium.org/182313012/diff/1/pkg/barback/test/package_gra...
File pkg/barback/test/package_graph/transform/concurrency_test.dart (right):

https://codereview.chromium.org/182313012/diff/1/pkg/barback/test/package_gra...
pkg/barback/test/package_graph/transform/concurrency_test.dart:6: // happening
concurrently or other complex asynchronous timing behavior.
On 2014/02/27 22:04:36, Bob Nystrom wrote:
> Doc comment.

Done.

[nweiz, 2014-02-27 22:13:31]

Committed patchset #2 manually as r33135 (presubmit successful).