Extends this bounds to contain the union of this and the given bounds.

@param Other TGMLatLngBounds to union.

@raises EGMWithoutOwner This exception is raised if the object don't have a owner.
@raises EGMOwnerWithoutJS This exception is raised if the owner can't execute JavaScript functions.
@raises EGMJSError This exception is raised if an error occurred executing JavaScript function.
@raises EGMUnassignedObject This exception is raised if LanLng param is unassigned.
