Remove some unreliable usages of setTimeout( ,0) from layout tests

Remove some unreliable usages of setTimeout( ,0) from layout tests

These are flaky after https://codereview.chromium.org/467153003, which
made a 0ms setTimeout() no longer be a minimum 1ms delay.

These tests all depend on doing work during or after the load event, but
attempt to do so in ways that aren't strictly guaranteed to meet that
requirement.

BUG=

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=185398

[Nate Chapin, 2014-11-14 22:50:39]

japhet@chromium.org changed reviewers:
+ dglazkov@chromium.org

[dglazkov, 2014-11-14 22:52:23]

lgtm

[Nate Chapin, 2014-11-14 22:52:34]

The CQ bit was checked by japhet@chromium.org

[commit-bot: I haz the power, 2014-11-14 22:53:13]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/733633003/1

[commit-bot: I haz the power, 2014-11-15 00:14:49]

Committed patchset #1 (id:1) as 185398