Convert X11 Related Code RunLoop::QuitClosures to use base::OnceClosure

BUG=714018,940130
TBR=sky@chromium.org

Change-Id: I5e3531b090a27fdbf4aec7fa379d2245099afa98
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1525298
Reviewed-by: Robert Liao <robliao@chromium.org>
Commit-Queue: Robert Liao <robliao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#641207}
1 file changed