GitLab

NativeViewHost does not safely handle the case where it is added and
then removed from a view hierarchy without ever being added to a
Widget. Instead it crashes. This CL fixes the crash.

Bug: None
Change-Id: Ib25f754386b6512973861c4603c1f1a91a0cdb1a
Reviewed-on: https://chromium-review.googlesource.com/c/1277687
Commit-Queue: Sadrul Chowdhury <sadrul@chromium.org>
Reviewed-by: Sadrul Chowdhury <sadrul@chromium.org>
Cr-Commit-Position: refs/heads/master@{#599651}