[ios] Move disabling of animation to progress bar only

Bug: 1006431
Change-Id: I73f9ba41dbffd1bd7d18a87ca3e74d25a53071cc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2228878
Commit-Queue: David Jean <djean@chromium.org>
Reviewed-by: Eugene But <eugenebut@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#775474}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: faeae6f97e5815e2d42172dc6630193996dfb176
9 files changed