Clear m_treeBoundaryCrossingScopes when reconstructing StyleResolver.

Clear m_treeBoundaryCrossingScopes when reconstructing StyleResolver.

When m_treeBoundaryCrossingScopes were part of StyleResolver, they were
cleared when the StyleResolver was cleared. Now that they outlive the
StyleResolver, they need to be cleared separately.

R=meade@chromium.org
BUG=659653
Committed: https://crrev.com/aed5a7036ec6809d303ca5db7bc3e91c17ac72b6
Cr-Commit-Position: refs/heads/master@{#427912}

[rune, 2016-10-26 22:33:18]

The CQ bit was checked by rune@opera.com to run a CQ dry run

[rune, 2016-10-26 22:33:39]

ptal

[commit-bot: I haz the power, 2016-10-26 22:33:55]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-10-27 00:00:48]

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

[commit-bot: I haz the power, 2016-10-27 00:00:49]

Dry run: This issue passed the CQ dry run.

[meade_UTC10, 2016-10-27 01:40:35]

lgtm

[meade_UTC10, 2016-10-27 01:57:19]

The CQ bit was checked by meade@chromium.org

[commit-bot: I haz the power, 2016-10-27 01:57:33]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-10-27 02:03:40]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-10-27 02:06:50]

Description was changed from

==========
Clear m_treeBoundaryCrossingScopes when reconstructing StyleResolver.

When m_treeBoundaryCrossingScopes were part of StyleResolver, they were
cleared when the StyleResolver was cleared. Now that they outlive the
StyleResolver, they need to be cleared separately.

R=meade@chromium.org
BUG=659653
==========

to

==========
Clear m_treeBoundaryCrossingScopes when reconstructing StyleResolver.

When m_treeBoundaryCrossingScopes were part of StyleResolver, they were
cleared when the StyleResolver was cleared. Now that they outlive the
StyleResolver, they need to be cleared separately.

R=meade@chromium.org
BUG=659653

Committed: https://crrev.com/aed5a7036ec6809d303ca5db7bc3e91c17ac72b6
Cr-Commit-Position: refs/heads/master@{#427912}
==========

[commit-bot: I haz the power, 2016-10-27 02:06:51]

Patchset 1 (id:??) landed as
https://crrev.com/aed5a7036ec6809d303ca5db7bc3e91c17ac72b6
Cr-Commit-Position: refs/heads/master@{#427912}