Issue #1751 -- Remove XP_MACOSX conditionals from /dom

dom/xul/nsXULElement.cpp

@@ -523,18 +523,6 @@ nsXULElement::IsFocusableInternal(int32_t *aTabIndex, bool aWithMouse)
   // elements are not focusable by default
   bool shouldFocus = false;
 
-#ifdef XP_MACOSX
-  // on Mac, mouse interactions only focus the element if it's a list,
-  // or if it's a remote target, since the remote target must handle
-  // the focus.
-  if (aWithMouse &&
-      IsNonList(mNodeInfo) &&
-      !EventStateManager::IsRemoteTarget(this))
-  {
-    return false;
-  }
-#endif
-
   nsCOMPtr<nsIDOMXULControlElement> xulControl = do_QueryObject(this);
   if (xulControl) {
     // a disabled element cannot be focused and is not part of the tab order