Start moving tree-boundary-crossing rules to ScopedStyleResolver.

Start moving tree-boundary-crossing rules to ScopedStyleResolver.

This is a step towards getting StyleResolver and the document-wide
TreeBoundaryCrossingRules removed.

Store tree-boundary-crossing rules on ScopedStyleResolver instead of
having a map between scope and tree-boundary-crossing rules in the
TreeBoundaryCrossingRules object.

What's left in TreeBoundaryCrossingRules is now a list of scopes which
contains tree-boundary-crossing rules. When we find an efficient way to
limit the scopes considered when resolving style for a given element, we
can get rid of TreeBoundaryCrossingRules completely, I think.

Adding @font-face and @keyframe rules is also moved into
ScopedStyleResolver and StyleResolver::processScopedRules can be removed.

BUG=401359
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=190549

[rune, 2015-02-18 07:26:11]

rune@opera.com changed reviewers:
+ hayato@chromium.org

[hayato, 2015-02-19 08:24:10]

Looks promising. I'll have a deeper look tomorrow.

[hayato, 2015-02-20 07:15:25]

lgtm

[rune, 2015-02-20 09:33:17]

The CQ bit was checked by rune@opera.com

[commit-bot: I haz the power, 2015-02-20 09:33:52]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/931143002/1

[commit-bot: I haz the power, 2015-02-20 10:52:35]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=190549