Refactor our radar mocks to more closely match what radarclient actually does. This will make a number of testing functions easier to write.
<rdar://problem/121291184>
Pull request: https://github.com/WebKit/WebKit/pull/23003
Committed 273305@main (8863d49ad857): <https://commits.webkit.org/273305@main> Reviewed commits have been landed. Closing PR #23003 and removing active labels.
Committed 272448.346@safari-7618-branch (c282f601c419): <https://commits.webkit.org/272448.346@safari-7618-branch> Reviewed commits have been landed. Closing PR #1035 and removing active labels.