b=934843 remove assertion that focus is never on popup windows r=roc

If an application has received focus from the window manager, but doesn't
reassign focus to a child window before closing its focus window, focus can
temporarily revert to PointerRoot before the window manager gives focus to
another window.  During PointerRoot focus, the window until the pointer has
focus even if it is an override-redirect window.

--HG--
extra : rebase_source : 3c005183f4602346ce9068b4a87af068f0e82372
Bug 946870 - make the cookie service report its memory; r=ehsan,njn
Bug 946781 - part 1 - split explicit/jsconnect into its constituent parts; r=bholley,njn
Bug 946781 - part 2 - add memory used by mozJSComponentLoader to about:memory; r=bholley,njn
Bug 946781 - part 3 - prepare for measuring multiple things from XPCWrappedNativeScope; r=bholley,njn
Bug 946781 - part 4 - revert measuring the proto and iface cache on nsGlobalWindow (bug 922094); r=me
Bug 946781 - part 5 - measure the proto and iface cache from within xpconnect; r=bholley,njn