GitLab

Hook up the +/- and fit to page/width buttons in the new PDF toolbar.

Note: This does not update or make use of the new zoom input field.

Bug: 1100428
Change-Id: I33a98f6ea2d065aae5a1557ae3a6c6edad619be0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2277333
Commit-Queue: Rebekah Potter <rbpotter@chromium.org>
Reviewed-by: dpapad <dpapad@chromium.org>
Cr-Commit-Position: refs/heads/master@{#786563}