remove xxx comment, followup for 391288. r=cbarrett a=josh

widget/src/cocoa/nsMenuX.mm

@@ -142,16 +142,14 @@ nsMenuX::Create(nsISupports * aParent, const nsAString &aLabel, const nsAString
   if (menubar && mMenuContent->GetChildCount() == 0)
     mVisible = PR_FALSE;
 
-  // XXXjag simply use mIsEnabled?
   SetEnabled(!mMenuContent->AttrValueIs(kNameSpaceID_None, nsWidgetAtoms::disabled,
                                         nsWidgetAtoms::_true, eCaseMatters));
+  [mNativeMenuItem setEnabled:(BOOL)mIsEnabled];
 
   NSString *newCocoaLabelString = MenuHelpersX::CreateTruncatedCocoaLabel(mLabel);
   mNativeMenuItem = [[NSMenuItem alloc] initWithTitle:newCocoaLabelString action:nil keyEquivalent:@""];
   [newCocoaLabelString release];
 
-  [mNativeMenuItem setEnabled:(BOOL)mIsEnabled];
-
   // We call MenuConstruct here because keyboard commands are dependent upon
   // native menu items being created. If we only call MenuConstruct when a menu
   // is actually selected, then we can't access keyboard commands until the