Follow-up changes for bug 257965 (writing-mode on first region).

Follow-up changes for bug 257965 (writing-mode on first region).

Some additional issues were raised and handled during code-review
on the WebKit side:

Add tests where the first region element is invalid and sets
writing-mode. It's invalid because it's inside the same flow
thread that it tries to flow from.

Coding-style adjustments.

Call RefPtr::release().

https://bugs.webkit.org/show_bug.cgi?id=119795

BUG=257965
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=157034

[mstensho (USE GERRIT), 2013-08-19 18:49:19]

I think it's desirable to keep the region code in WebKit and Blink as similar as
possible, at least for now, so I'm submitting a small follow-up.

[mihnea, 2013-08-27 13:38:27]

On 2013/08/19 18:49:19, Morten Stenshorne wrote:
> I think it's desirable to keep the region code in WebKit and Blink as similar
as
> possible, at least for now, so I'm submitting a small follow-up.

LGTM. Elliot, would you please review this little one?

[esprehn, 2013-08-31 05:39:05]

LGTM

[commit-bot: I haz the power, 2013-08-31 08:30:45]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/mstensho@opera.com/23064019/1

[commit-bot: I haz the power, 2013-08-31 18:20:03]

Change committed as 157034