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Its really hard to see, and almost impossible to read when shrunk. But
animating the transform/opacity will add extra animations for most
overview operations.

This call is a no-op because we now suspend shelf changes until overview
mode is animated in/out. The calls in workspace manager handled updating
the shelf even without the suspend changes, so this was not needed for a
 while.

Test: none
Bug: 946780, 914147
Change-Id: Ica1c61ea5ae408addd401a9e797fcf4c5aa5003c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1544231
Commit-Queue: Sammie Quon <sammiequon@chromium.org>
Reviewed-by: Dominick Ng <dominickn@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Cr-Commit-Position: refs/heads/master@{#649218}