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Per UX instructions, the only UI appearing on hover should be the pin.

Bug: 1166920
Change-Id: Ibdda78b1a60e83ec62ac381b30212dc57854c82e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2631452Reviewed-by: Toni Baržić <tbarzic@chromium.org>
Commit-Queue: David Black <dmblack@google.com>
Cr-Commit-Position: refs/heads/master@{#843906}