svg/custom/getsvgdocument.html is flakey

svg/custom/getsvgdocument.html is flakey

See the flakiness dashboard:
http://test-results.appspot.com/dashboards/flakiness_dashboard.html#group=%40ToT%20Blink&tests=svg%2Fcustom%2Fgetsvgdocument.html

The cause is explained in crbug.com/284734 .

BUG=284734
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=157404

[tony, 2013-09-06 23:25:16]

This is confusing the try bots.

[eseidel, 2013-09-07 00:40:37]

lgtm

[leviw_travelin_and_unemployed, 2013-09-07 00:40:57]

lgtm

[commit-bot: I haz the power, 2013-09-07 00:41:01]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/tony@chromium.org/23598009/1

[commit-bot: I haz the power, 2013-09-07 01:58:21]

Change committed as 157404