Don't schedule wholeSubtreeInvalid sets.

The StyleInvalidator asserts if we scheduled such sets. Mark element
for SubtreeStyleChange instead.

R=esprehn@chromium.org,ericwilligers@chromium.org
BUG=624607

Review-Url: https://codereview.chromium.org/2106063007
Cr-Commit-Position: refs/heads/master@{#403663}
2 files changed