Provide a wrapper around EventLoopTimer* so that the timer can be automatically stopped when setting it to nullptr for example.
Pull request: https://github.com/WebKit/WebKit/pull/16498
Committed 266715@main (6b2ef317d683): <https://commits.webkit.org/266715@main> Reviewed commits have been landed. Closing PR #16498 and removing active labels.
<rdar://problem/113609524>