Use border-box sizing for the HR element.

Use border-box sizing for the HR element.

This matches Firefox's UA stylesheet.

BUG=17217
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=193582

[rhogan, 2014-12-10 19:07:28]

robhogan@gmail.com changed reviewers:
+ leviw@chromium.org

[leviw_travelin_and_unemployed, 2015-04-08 18:37:01]

lgtm

[rhogan, 2015-04-08 21:41:39]

The CQ bit was checked by robhogan@gmail.com

[rhogan, 2015-04-08 21:41:40]

The patchset sent to the CQ was uploaded after l-g-t-m from leviw@chromium.org
Link to the patchset: https://codereview.chromium.org/500093002/#ps140001
(title: "Updated")

[commit-bot: I haz the power, 2015-04-08 21:42:27]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/500093002/140001

[rhogan, 2015-04-09 18:09:42]

The CQ bit was checked by robhogan@gmail.com

[rhogan, 2015-04-09 18:09:43]

The patchset sent to the CQ was uploaded after l-g-t-m from leviw@chromium.org
Link to the patchset: https://codereview.chromium.org/500093002/#ps180001
(title: "Updated")

[commit-bot: I haz the power, 2015-04-09 18:10:09]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/500093002/180001

[commit-bot: I haz the power, 2015-04-09 22:04:32]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-04-09 22:04:33]

Try jobs failed on following builders:
  win_blink_rel on tryserver.blink (JOB_FAILED,
http://build.chromium.org/p/tryserver.blink/builders/win_blink_rel/builds/58590)

[rhogan, 2015-04-10 22:26:29]

The CQ bit was checked by robhogan@gmail.com

[rhogan, 2015-04-10 22:26:30]

The patchset sent to the CQ was uploaded after l-g-t-m from leviw@chromium.org
Link to the patchset: https://codereview.chromium.org/500093002/#ps200001
(title: "Updated")

[commit-bot: I haz the power, 2015-04-10 22:27:34]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/500093002/200001

[commit-bot: I haz the power, 2015-04-11 01:05:12]

Committed patchset #11 (id:200001) as
https://src.chromium.org/viewvc/blink?view=rev&revision=193582

[myakura, 2015-05-12 05:08:37]

On 2015/04/08 at 18:37:01, leviw wrote:
> lgtm

hmm. the spec does not suggest hr to be border-box (
https://html.spec.whatwg.org/multipage/rendering.html#the-hr-element-2 ).

it looks only Gecko uses border-box
(https://github.com/necolas/normalize.css/blob/master/normalize.css#L208-L215) .
do we really want the defaut style to change?