layout tests: Fixes property enumeration tests.

layout tests: Fixes property enumeration tests.

In for (prop in obj), there is no guarantee about the order of property list.
We should not rely on a specific order of listing.  Fixes tests by sorting
properties.

BUG=43394
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=189859

[Yuki, 2015-02-09 09:53:36]

yukishiino@chromium.org changed reviewers:
+ haraken@chromium.org, jsbell@chromium.org

[Yuki, 2015-02-09 09:53:37]

Could you review this CL?

[haraken, 2015-02-09 11:22:13]

LGTM

[jsbell, 2015-02-09 17:43:41]

lgtm

The order should be stable, though implementation defined. (In Chrome/V8 it
would be own array-index-like props, then own other props in definition order,
then repeat for the prototype, ...). So we could also just one-time re-order the
expected lists.

[Yuki, 2015-02-10 01:59:06]

The CQ bit was checked by yukishiino@chromium.org

[commit-bot: I haz the power, 2015-02-10 01:59:46]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/906963002/1

[commit-bot: I haz the power, 2015-02-10 03:24:00]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=189859