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The current implementation of animated avatar didn't consider small
pods, resulting in the listed bug.

Also sets a timeout for switch animation.

Bug: 751343, 721647
Change-Id: I5b9cafc737c082865d33520cfafca2963554be4f
Reviewed-on: https://chromium-review.googlesource.com/597051Reviewed-by: Alexander Alekseev <alemate@chromium.org>
Commit-Queue: Wenzhao (Colin) Zang <wzang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#491419}