GitLab

Automatically reset the |in_paint_| boolean when DoPaint() finishes,
instead of doing it manually.

Change-Id: I6049a728f05a691a36ece682062d8a149c4a062b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2154232Reviewed-by: Daniel Hosseinian <dhoss@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#760165}