GitLab

Otherwise destructor which cleans up observers will not be called.

Fixed: 1011330
Change-Id: I62927c958757e8411b3a96e565617cb94547edd1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1900139Reviewed-by: Xiaoqian Dai <xdai@chromium.org>
Commit-Queue: Sammie Quon <sammiequon@chromium.org>
Cr-Commit-Position: refs/heads/master@{#712857}