1 Tests invalidations produced by scrolling a page with position: fixed elements.
5 cause : {reason: Scroll with viewport-constrained element, stackTrace: .../inspector/tracing/scroll-invalidations.html:11}
6 changedAttribute : undefined
7 changedClass : undefined
9 changedPseudo : undefined
12 selectorPart : undefined
13 type : "ScrollInvalidationTracking"