Usage of nsIFrameLoaderOwner Interface

 Swap frame loaders with the given nsIFrameLoaderOwner.  This may
 only be posible in a very limited range of circumstances, or
 never, depending on the object implementing this interface.

 @throws NS_ERROR_NOT_IMPLEMENTED if the swapping logic is not
   implemented for the two given frame loader owners.
 @throws NS_ERROR_DOM_SECURITY_ERR if the swap is not allowed on
   security grounds.

void swapFrameLoaders(in nsIFrameLoaderOwner aOtherOwner)