GitLab

Cherry pick the HarfBuzz commit 8ac345e5c0ed0aad6547592ea0839aabfb4ba980
as it fixes a set of serious shaping regressions in the core text shaper
on Mac OS. Cherry picking as opposed to rolling to allow for a clean DI.

BUG=459043
TBR=behdad@chromium.org

Review URL: https://codereview.chromium.org/971153002

Cr-Commit-Position: refs/heads/master@{#318901}