Allow content property to roundtrip

Allow content property to roundtrip

Before this patch the content property parsing did
not allow comma separated values but did use comma
separated value lists for serialization. This patch changes
that behavior to always use space separated lists and
adds a test to make sure roundtripping content works.

BUG=428445
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=184993

[rwlbuis, 2014-11-07 18:41:01]

rob.buis@samsung.com changed reviewers:
+ timloh@chromium.org

[rwlbuis, 2014-11-07 18:41:01]

PTAL

[Timothy Loh, 2014-11-07 18:46:15]

On 2014/11/07 18:41:01, rwlbuis wrote:
> PTAL

lgtm

I would've just written a test like css-parser/counter-parsing.html since
property-parsing-test.js checks round-tripping.

[rwlbuis, 2014-11-07 18:49:35]

On 2014/11/07 18:46:15, Timothy Loh wrote:
> On 2014/11/07 18:41:01, rwlbuis wrote:
> > PTAL
> 
> lgtm

Thanks!

> I would've just written a test like css-parser/counter-parsing.html since
> property-parsing-test.js checks round-tripping.

I was not aware of this machinery :) I'll go for this then, especially if the
test gets smaller, before landing.

[rwlbuis, 2014-11-07 21:48:52]

The CQ bit was checked by rob.buis@samsung.com

[commit-bot: I haz the power, 2014-11-07 21:49:27]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/707923003/80001

[commit-bot: I haz the power, 2014-11-07 22:52:59]

Committed patchset #5 (id:80001) as 184993