Add more assertions in BackgroundProcessResponsivenessTimer to help figure out the source of <rdar://problem/32251578>.
Created attachment 310434 [details] Patch
Comment on attachment 310434 [details] Patch rs=me
Comment on attachment 310434 [details] Patch Clearing flags on attachment: 310434 Committed r217006: <http://trac.webkit.org/changeset/217006>
All reviewed patches have been landed. Closing bug.