:host-context selectors may affect insertion point descendants.

:host-context selectors may affect insertion point descendants.

At insertion points, we schedule style recalcs for inserted nodes when we
have a StyleRecalcChange at the insertion point's parent. One of the reasons
is that :host-context selectors which affect inserted nodes may rely on
matching nodes which are not ascendants of the inserted nodes in the dom
used for selector matching.

We did use a LocalStyleChange for the inserted nodes, but these selectors
may affect any node in the inserted node's subtree. Hence, we start using
SubtreeStyleChange instead.

R=esprehn@chromium.org,dglazkov@chromium.org
BUG=381020
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=175636

[rune, 2014-06-05 21:39:14]

PTAL

[esprehn, 2014-06-05 23:30:16]

lgtm

[commit-bot: I haz the power, 2014-06-05 23:31:18]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/rune@opera.com/317953002/1

[commit-bot: I haz the power, 2014-06-06 01:21:31]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  win_gpu_triggered_tests on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/win_gpu_triggered...)

[commit-bot: I haz the power, 2014-06-06 01:21:55]

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

[commit-bot: I haz the power, 2014-06-06 01:21:56]

Try jobs failed on following builders:
  win_gpu_triggered_tests on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/win_gpu_triggered...)

[esprehn, 2014-06-06 01:24:31]

The CQ bit was checked by esprehn@chromium.org

[commit-bot: I haz the power, 2014-06-06 01:24:56]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/rune@opera.com/317953002/1

[commit-bot: I haz the power, 2014-06-06 01:26:24]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  win_gpu_triggered_tests on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/win_gpu_triggered...)

[commit-bot: I haz the power, 2014-06-06 01:26:48]

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

[commit-bot: I haz the power, 2014-06-06 01:26:49]

Try jobs failed on following builders:
  win_gpu_triggered_tests on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/win_gpu_triggered...)

[rune, 2014-06-06 05:28:16]

The CQ bit was checked by rune@opera.com

[commit-bot: I haz the power, 2014-06-06 05:29:05]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/rune@opera.com/317953002/1

[commit-bot: I haz the power, 2014-06-06 05:30:05]

Change committed as 175636