GitLab

crrev.com/c/1062661 made it so that any time an accessibility node changes,
we re-serialize the entire CSS block it's contained in - while this fixed
some correctness issues, it introduced a performance regression that's
too significant to ignore.

This change rolls back the fix for now until we can find a way to fix it
that doesn't impact performance.

TBR=dtseng@chromium.org

Bug: 868830, 865621, 843746
Change-Id: I900a4e6ba796608974e881f091b99b0d45c09536
Reviewed-on: https://chromium-review.googlesource.com/1174851Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
Commit-Queue: Dominic Mazzoni <dmazzoni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#583182}