Add a test for font/line-height cascade.

Add a test for font/line-height cascade.

The line-height property has lots of special handling in the style
resolver which we want to remove at some point. When we do, it's nice to
know that this still works correctly.

R=rune@opera.com
BUG=353932
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=184346

[andersr, 2014-10-24 09:20:01]

Note: I verified that this fails with https://codereview.chromium.org/670373002/
.

[rune, 2014-10-24 09:25:05]

lgtm

Out of curiosity, do these tests all pass in Gecko and Trident?

[Timothy Loh, 2014-10-24 09:34:07]

On 2014/10/24 09:17:48, andersr wrote:

lgtm

[andersr, 2014-10-24 09:47:30]

> Out of curiosity, do these tests all pass in Gecko and Trident?

Trident: Yes.
Gecko: Yes. [*]
[Bonus Info!] Presto: Yes.

[*] Although the default computed value of line-height in FF is apparently
13px/14px, and not "normal", so the test technically fails as-is.

[andersr, 2014-10-24 09:47:38]

The CQ bit was checked by andersr@opera.com

[commit-bot: I haz the power, 2014-10-24 09:47:56]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/678483005/1

[commit-bot: I haz the power, 2014-10-24 10:49:04]

Committed patchset #1 (id:1) as 184346