allow popup window types in cocoa widgets (e.g. popup menus). we have to fix them, so might as well turn them on. no bug. sr=pinkerton

widget/src/cocoa/nsCocoaWindow.mm

@@ -148,10 +148,6 @@ nsresult nsCocoaWindow::StandardCreate(nsIWidget *aParent,
     if (mWindowType == eWindowType_popup || mWindowType == eWindowType_invisible)
       features = 0;
 
-    // XXXdwh Just don't make popup windows yet.  They mess up the world.
-    if (mWindowType == eWindowType_popup)
-      return NS_OK;
-
     mWindow = [[NSWindow alloc] initWithContentRect:rect styleMask:features 
                                 backing:NSBackingStoreBuffered defer:NO];