GitLab

This CL fixes a bug whereby the WebView class was not updating
its accessible parent view when reparented to a new Widget
hierarchy.

Using VoiceOver on Mac while reparenting the WebView otherwise
results in a crash.

Bug: 1148710
Change-Id: If690f1bdcb669cddde411cbdeb64890ac774bd0b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2537594
Commit-Queue: Thomas Lukaszewicz <tluk@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Cr-Commit-Position: refs/heads/master@{#827895}