tree b651b3a2964aaa4e4f25ea355c63301da0cc3c8f
parent de098e0d9aa37e1db404b86ba5bfb1992008719a
author rune <rune@opera.com> 1483530890 -0800
committer Commit bot <commit-bot@chromium.org> 1483531053 +0000

Avoid unnecessary updateActiveStyle comparing shadow styles.

Found while checking performance for issue 603621.

Style sharing is done during style recalc at which point we know that
the active style is up-to-date. Instead of using the API for
document.styleSheets, compare active stylesheets in ScopedStyleResolver
directly.

BUG=603621

Review-Url: https://codereview.chromium.org/2610513003
Cr-Commit-Position: refs/heads/master@{#441357}