As it says in the summary. <rdar://problem/13540351>
Created attachment 196297 [details] Patch v1
I have a follow-up patch that I'll post after this one is landed which cleans up registerOcclusionNotificationHandlers / unregisterOcclusionNotificationHandlers.
Attachment 196297 [details] did not pass style-queue: Failed to run "['Tools/Scripts/check-webkit-style', '--diff-files', u'Source/WebKit2/ChangeLog', u'Source/WebKit2/UIProcess/mac/WebContextMac.mm']" exit_code: 1 Source/WebKit2/ChangeLog:1: ChangeLog entry has no bug number [changelog/bugnumber] [5] Total errors found: 1 in 2 files If any of these errors are false positives, please file a bug against check-webkit-style.
Comment on attachment 196297 [details] Patch v1 View in context: https://bugs.webkit.org/attachment.cgi?id=196297&action=review > Source/WebKit2/ChangeLog:3 > + <rdar://problem/13540351> Enable process suppression when no windows in the application have drawn recently. Please add the bugs.webkit.org bug number. > Source/WebKit2/ChangeLog:8 > + (WebKit): Please remove bogus lines like this.
This was landed back in r147592.