Tests that merged statistic overwrites old statistic

On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".


PASS Host overwrote old prevalent resource value.
PASS Host overwrote old very prevalent resource value.
PASS Host overwrote old user interaction value.
PASS Host overwrote old grandfathered value.
PASS Host set as subframe under top frame1.
PASS Host set as subframe under top frame2.
PASS successfullyParsed is true

TEST COMPLETE