The following test cases in FrameThrottlingTest:

ScrollingCoordinatorShouldSkipThrottledFrame
ThrottledTopLevelEventHandlerIgnored
ThrottledEventHandlerIgnored

are skipped for SPv2 because they depend on SPv1 features to pass, but the tested functionalities should work for SPv2.

There are also other tests skipped for SPv2 because they don't apply in SPv2. We should just remove them when we remove non-SPv2 code.