Test logging of link decorated cross-site navigations from a prevalent resource.

Resource load statistics:

Registrable domain: localhost
    lastSeen: 0
    hadUserInteraction: No
    mostRecentUserInteraction: -1
    grandfathered: No
    topFrameLinkDecorationsFrom:
        127.0.0.1
    gotLinkDecorationFromPrevalentResource: Yes    isPrevalentResource: No
    isVeryPrevalentResource: No
    dataRecordsRemoved: 0
Registrable domain: 127.0.0.1
    lastSeen: 0
    hadUserInteraction: No
    mostRecentUserInteraction: -1
    grandfathered: No
    gotLinkDecorationFromPrevalentResource: No    isPrevalentResource: Yes
    isVeryPrevalentResource: No
    dataRecordsRemoved: 0