WPE should install MemoryPressureHandler in UIProcess This doesn't do anything currently, but when we enable PSON it will shut down prewarmed processes and clear suspended processes, so it's important.
Created attachment 361948 [details] Patch
Ping reviewers
Comment on attachment 361948 [details] Patch Clearing flags on attachment: 361948 Committed r242012: <https://trac.webkit.org/changeset/242012>
All reviewed patches have been landed. Closing bug.