Function pointerleave

src/material/slider/slider.spec.ts:652–654

()

    }

    function pointerleave() {
      dispatchPointerEvent(input._hostElement, 'pointermove', thumbX + 1000, thumbY);
    }

    function pointerdown() {
      dispatchPointerEvent(input._hostElement, 'pointerdown', thumbX, thumbY);