Seemingly random after a few page reloads the minibrowser will freeze will loading a page and the webprocess will be unresponsive. Investigation reveals it blocks in PluginProcessConnectionManager::getPluginProcessConnection(), due to a synchronous call to UIProcess.
Created attachment 156698 [details] Patch
*** Bug 84436 has been marked as a duplicate of this bug. ***
Comment on attachment 156698 [details] Patch This is not enough. I can still trigger hangs by manually killing the pluginprocess and reloading the page.
Created attachment 157162 [details] Patch
Comment on attachment 157162 [details] Patch Clearing flags on attachment: 157162 Committed r125024: <http://trac.webkit.org/changeset/125024>
All reviewed patches have been landed. Closing bug.