GitLab

 - SetZoomLevelForView() was not used anywhere.
 - GetZoomLevelForView() was only used in a test. Replaced with GetZoomLevel().

Bug: None
Change-Id: If481d2477e924a4119d49ba586679c63d0320fc8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1877647
Auto-Submit: Demetrios Papadopoulos <dpapad@chromium.org>
Reviewed-by: James MacLean <wjmaclean@chromium.org>
Commit-Queue: Demetrios Papadopoulos <dpapad@chromium.org>
Cr-Commit-Position: refs/heads/master@{#711438}