GitLab

The |window_type| is always ws::mojom::WindowType::WINDOW, so it
doesn't need to be a parameter.

Bug: none
Change-Id: Id0ec9146d64e9653983f12945a1436083371633c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1506110
Auto-Submit: James Cook <jamescook@chromium.org>
Commit-Queue: Evan Stade <estade@chromium.org>
Reviewed-by: Evan Stade <estade@chromium.org>
Cr-Commit-Position: refs/heads/master@{#638284}