This just needs a typo fix, actually PluginInfoStore::getPluginInfo just forgot to set the values to it's (out) parameter. It was my fault.
Created attachment 71433 [details] Patch
Comment on attachment 71433 [details] Patch r=me
Comment on attachment 71433 [details] Patch Clearing flags on attachment: 71433 Committed r70237: <http://trac.webkit.org/changeset/70237>
All reviewed patches have been landed. Closing bug.