[webkit-reviews] review requested: [Bug 59540] REGRESSION: white overlay scrollbars on apple.com/startpage : [Attachment 91386] Patch

[bugzilla-daemon at webkit.org]

Jon Lee <jonlee at apple.com> has asked  for review:
Bug 59540: REGRESSION: white overlay scrollbars on apple.com/startpage
https://bugs.webkit.org/show_bug.cgi?id=59540

Attachment 91386: Patch
https://bugs.webkit.org/attachment.cgi?id=91386&action=review

------- Additional Comments from Jon Lee <jonlee at apple.com>
Including the base background for short-circuit tests, and adding a comment in
Color.h re: blend() function.