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Not doing so caused issues with playing videos in full screen mode on
older versions of Windows, when we stopped removing WS_THICKFRAME in
crrev.com/c/1972258.

Bug: 1014720,1141059
Change-Id: I57b01051c457b35b37c465ce3b38d60bf896c32e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2510354Reviewed-by: Sadrul Chowdhury <sadrul@chromium.org>
Reviewed-by: Robert Liao <robliao@chromium.org>
Commit-Queue: David Bienvenu <davidbienvenu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#824543}