Fix transitions/cross-fade-background-image.html

Fix transitions/cross-fade-background-image.html

This test started failing after codereview.chromium.org/716963002. The
change to transitions/cross-fade-border-image.html in the linked patch
is similar. Since the tryservers don't have numbers in their paths we
didn't notice this test needed updating.

BUG=432566
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=185231

[Timothy Loh, 2014-11-12 17:37:55]

timloh@chromium.org changed reviewers:
+ alancutter@chromium.org, senorblanco@chromium.org

[alancutter (OOO until 2018), 2014-11-12 17:57:39]

The CQ bit was checked by alancutter@chromium.org

[alancutter (OOO until 2018), 2014-11-12 17:57:39]

lgtm

[commit-bot: I haz the power, 2014-11-12 17:58:47]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/722753002/20001

[Stephen White, 2014-11-12 18:35:29]

LGTM2 FWIW. Thanks!

[commit-bot: I haz the power, 2014-11-12 18:44:38]

Committed patchset #2 (id:20001) as 185231