WTF::Win32Handle: Check the DuplicateHandle result As per the reviewer comment, it's not clear what happens if DuplicateHandle fails. https://github.com/WebKit/WebKit/pull/13611#discussion_r1191924367
Pull request: https://github.com/WebKit/WebKit/pull/14437
Committed 264637@main (a9296b7cf56e): <https://commits.webkit.org/264637@main> Reviewed commits have been landed. Closing PR #14437 and removing active labels.
<rdar://problem/109941686>