Make directory_list_sync_test faster

Make directory_list_sync_test faster

Let it iterate over 20000 entries instead of 200000 by starting in dart/tests instead of dart.

R=ricow@google.com

Committed: https://code.google.com/p/dart/source/detail?r=36309

[ricow1, 2014-05-19 17:40:22]

+ajohnsen fyi
LGTM

https://codereview.chromium.org/286063006/diff/1/tests/standalone/io/director...
File tests/standalone/io/directory_list_sync_test.dart (right):

https://codereview.chromium.org/286063006/diff/1/tests/standalone/io/director...
tests/standalone/io/directory_list_sync_test.dart:9: //
tests/standalone/io/../../..
update comment

https://codereview.chromium.org/286063006/diff/1/tests/standalone/io/director...
tests/standalone/io/directory_list_sync_test.dart:11: print("Recursively listing
entries in directory ${startingDir.path} ...");
do we really need this?

[hausner, 2014-05-19 17:43:42]

Thank you.

https://codereview.chromium.org/286063006/diff/1/tests/standalone/io/director...
File tests/standalone/io/directory_list_sync_test.dart (right):

https://codereview.chromium.org/286063006/diff/1/tests/standalone/io/director...
tests/standalone/io/directory_list_sync_test.dart:9: //
tests/standalone/io/../../..
On 2014/05/19 17:40:22, ricow1 wrote:
> update comment

Done.

https://codereview.chromium.org/286063006/diff/1/tests/standalone/io/director...
tests/standalone/io/directory_list_sync_test.dart:11: print("Recursively listing
entries in directory ${startingDir.path} ...");
On 2014/05/19 17:40:22, ricow1 wrote:
> do we really need this?
It helped me understand what's going on. I can take it out if it interferes with
anything in the test harness.

[hausner, 2014-05-19 17:44:26]

Committed patchset #2 manually as r36309 (presubmit successful).