GitLab

When PDFViewerUpdate is on, |topToolbarHeight| is always zero. The code
that uses |topToolbarHeight| in calculations is effectively a no-op and
can be deleted.

This CL reverts a subset of the changes in r789720, as they are no
longer needed.

Bug: None
Change-Id: Icd6a6b7b91ae2137e9a81dd68c3c53ad031a3840
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2541607Reviewed-by: Rebekah Potter <rbpotter@chromium.org>
Commit-Queue: Rebekah Potter <rbpotter@chromium.org>
Auto-Submit: dpapad <dpapad@chromium.org>
Cr-Commit-Position: refs/heads/master@{#828298}