Layout support for new ellipse shape syntax

Layout support for new ellipse shape syntax

Implement support for doing layout with the new ellipse shape syntax,
including basic animation support.

Add a test for the new ellipse syntax. The old tests in
LayoutTests/csswg will be removed when the old syntax is removed.

Also update existing shape-inside, animation, and clip-path tests to
test the new syntax.

BUG=322165
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=164901

[Bem Jones-Bey (adobe), 2014-01-03 22:48:39]

lgtm

[rwlbuis, 2014-01-09 21:16:27]

This is very similar to https://codereview.chromium.org/115253003/

[rwlbuis, 2014-01-10 19:01:04]

On 2014/01/09 21:16:27, rwlbuis wrote:
> This is very similar to https://codereview.chromium.org/115253003/

Bots are green again after I noticed a merge problem. Should be easier to review
than 115253003, and Bem already okayed :)

[leviw_travelin_and_unemployed, 2014-01-10 19:09:15]

lgtm

[commit-bot: I haz the power, 2014-01-10 19:09:52]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/rob.buis@samsung.com/124303002/180001

[commit-bot: I haz the power, 2014-01-10 20:47:16]

Change committed as 164901