Moving clock timeout flakiness guard in test to 20 ms

Moving clock timeout flakiness guard in test to 20 ms

Up to 10 ms backwards clock jumps has been seen on XP, 2 ms on Win7.

BUG=282620
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=157448

[hta - Chromium, 2013-09-06 11:28:53]

PTAL.

[tommi (sloooow) - chröme, 2013-09-06 11:34:28]

hey hta - sorry, I thought this was a chromium change.  I'm sorry but I don't
have any powers in blink land.

[Tommy Widenflycht, 2013-09-09 07:24:09]

lgtm

[commit-bot: I haz the power, 2013-09-09 07:26:14]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/hta@chromium.org/23648005/1

[commit-bot: I haz the power, 2013-09-09 07:35:47]

Step "update" is always a major failure.
Look at the try server FAQ for more details.
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win_layout...

[commit-bot: I haz the power, 2013-09-09 09:56:44]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/hta@chromium.org/23648005/1

[commit-bot: I haz the power, 2013-09-09 10:58:14]

Change committed as 157448