Skip traversing wholeSubtree subtrees with clean invalidation bits.
During style invalidation we need to continue to traverse a subtree that is
marked with SubtreeStyleChange to clear any remaining invalidation bits.
But, when the childNeedsInvalidation bit is not set, there should be no
bits left to clear in the subtree. Hence, we can skip traversing that
subtree.
R=esprehn@chromium.org,chrishtr@chromium.org
BUG=381062
Review URL: https://codereview.chromium.org/317133002
git-svn-id: svn://svn.chromium.org/blink/trunk@175564 bbb929c8-8fbe-4397-9dbb-9b2b20218538
3 files changed
