The code to protect HTMLMediaElement.volume from being writable is guarded by some PLATFORM(IOS_FAMILY) tests. Make this a HAVE() test so it can be expanded a bit easier.
<rdar://problem/95252820>
Pull request: https://github.com/WebKit/WebKit/pull/1559
Committed r295620 (251625@main): <https://commits.webkit.org/251625@main> Reviewed commits have been landed. Closing PR #1559 and removing active labels.