css3/filters/effect-brightness-hw.html and fast/backgrounds/background-blend-mode-difference.html need tolerance fixes.
<rdar://problem/102343940>
Pull request: https://github.com/WebKit/WebKit/pull/6495
Committed 256698@main (6a24c45c3362): <https://commits.webkit.org/256698@main> Reviewed commits have been landed. Closing PR #6495 and removing active labels.