Mark http/tests/inspector/service-workers/user-agent-override.html as Slow

Mark http/tests/inspector/service-workers/user-agent-override.html as Slow

BUG=491764
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=196291

[Kunihiko Sakamoto, 2015-05-29 03:57:55]

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

[Kunihiko Sakamoto, 2015-05-29 03:57:56]

http://test-results.appspot.com/dashboards/flakiness_dashboard.html#tests=htt...

Crashes and failures went away, but still we see occasional timeouts.
Maybe it's just slow?

[horo, 2015-06-02 02:36:07]

lgtm

[Kunihiko Sakamoto, 2015-06-02 03:09:53]

The CQ bit was checked by ksakamoto@chromium.org

[commit-bot: I haz the power, 2015-06-02 03:10:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1155043003/1

[commit-bot: I haz the power, 2015-06-02 05:27:38]

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

[commit-bot: I haz the power, 2015-06-02 05:27:39]

Try jobs failed on following builders:
  win_blink_rel on tryserver.blink (JOB_FAILED,
http://build.chromium.org/p/tryserver.blink/builders/win_blink_rel/builds/64718)

[Kunihiko Sakamoto, 2015-06-02 05:32:12]

The CQ bit was checked by ksakamoto@chromium.org

[commit-bot: I haz the power, 2015-06-02 05:32:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1155043003/1

[commit-bot: I haz the power, 2015-06-02 07:25:59]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=196291