Avoid unnecessary invalidation scheduling.
This is a reland of https://codereview.chromium.org/1514733002 without
the removal of an assumed-to-be SubtreeStyleChange for attribute changes
when you have a null style resolver, which turned out to cause asserts.
We skip scheduling invalidation sets for an element when:
* StyleResolver is null
* Element is not inActiveDocument()
* Element does not have a parent
* Element parent has SubtreeStyleChange or ReattachStyleChange
Additionally we skip descendant invalidations when:
* Element has SubtreeStyleChange or ReattachStyleChange
and sibling invalidations when:
* Element.nextSibling is null
R=ruuda@google.com
BUG=557440
Review URL: https://codereview.chromium.org/1560693002
Cr-Commit-Position: refs/heads/master@{#367617}
5 files changed
