Deflake http/tests/serviceworker/resource-timing.html

Deflake http/tests/serviceworker/resource-timing.html

This reverts test change of crrev.com/1166953007. When ServiceWorker is
already started, workerStart and {fetch,redirect}Start are so close that
they can take the same value.

BUG=498167
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=196939

[Kunihiko Sakamoto, 2015-06-09 11:00:09]

ksakamoto@chromium.org changed reviewers:
+ kinuko@chromium.org

[kinuko, 2015-06-10 05:43:58]

lgtm

[Kunihiko Sakamoto, 2015-06-11 00:43:20]

The CQ bit was checked by ksakamoto@chromium.org

[commit-bot: I haz the power, 2015-06-11 00:43:41]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1168403002/1

[commit-bot: I haz the power, 2015-06-11 01:37:25]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-06-11 01:37:25]

Try jobs failed on following builders:
  linux_blink_rel on tryserver.blink (JOB_FAILED,
http://build.chromium.org/p/tryserver.blink/builders/linux_blink_rel/builds/6...)

[Kunihiko Sakamoto, 2015-06-11 10:35:25]

The CQ bit was checked by ksakamoto@chromium.org

[commit-bot: I haz the power, 2015-06-11 10:35:40]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1168403002/1

[commit-bot: I haz the power, 2015-06-11 11:48:00]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=196939