Share recalcChildStyle between Element and ShadowRoot.

Share recalcChildStyle between Element and ShadowRoot.

Instead of needing to update both loops any time we change anything we
should just put the Element specific things in Element::recalcStyle and
then put the shared method into ContainerNode. I also removed an old
comment about ShadowRoot::recalcStyle not supporting adjacent selectors
properly (I fixed that bug a long time ago).

There should be no change in behavior, I just moved the code around.

BUG=399816
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=181500

[esprehn, 2014-09-05 23:58:22]

esprehn@chromium.org changed reviewers:
+ leviw@chromium.org, ojan@chromium.org

[leviw_travelin_and_unemployed, 2014-09-06 00:03:28]

Cool, makes sense. LGTM.

[esprehn, 2014-09-06 00:08:53]

The CQ bit was checked by esprehn@chromium.org

[commit-bot: I haz the power, 2014-09-06 00:09:57]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/esprehn@chromium.org/548693002/80001

[commit-bot: I haz the power, 2014-09-06 02:09:12]

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

[commit-bot: I haz the power, 2014-09-06 02:09:13]

Try jobs failed on following builders:
  win_blink_rel on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/win_blink_rel/builds/25850)

[esprehn, 2014-09-06 02:16:20]

The CQ bit was checked by esprehn@chromium.org

[commit-bot: I haz the power, 2014-09-06 02:17:23]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/esprehn@chromium.org/548693002/80001

[commit-bot: I haz the power, 2014-09-06 12:22:16]

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

[commit-bot: I haz the power, 2014-09-06 12:22:17]

Exceeded time limit waiting for builds to trigger.

[esprehn, 2014-09-06 16:36:39]

The CQ bit was checked by esprehn@chromium.org

[commit-bot: I haz the power, 2014-09-06 16:37:14]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/esprehn@chromium.org/548693002/80001

[commit-bot: I haz the power, 2014-09-06 16:37:58]

Committed patchset #5 (id:80001) as 181500