<rdar://problem/59341136>
Created attachment 392527 [details] proposed patch.
Created attachment 392537 [details] patch for landing. Thanks for the review. Fixed the test to only run the default configuration: it relies on GC not running often, and hence, will not work with GC continuous configurations. Re-testing on the EWS now.
I skipped the test for memory limited devices. Landed in r257907: <http://trac.webkit.org/r257907>.