[GPUProcess] MediaController is using a ClockCM
<rdar://problem/74468569>
Created attachment 422164 [details] Patch
Created attachment 422173 [details] Update the test expectation of media/video-controller-child-rate.html
Committed r273895: <https://commits.webkit.org/r273895> All reviewed patches have been landed. Closing bug and clearing flags on attachment 422173 [details].