Method onMeasure

src/custom-element.js:968–975

* Calls onLayoutMeasure() on the BaseElement implementation. * Should only be called by Resources.

()

     * Should only be called by Resources.
     */
    onMeasure() {
      devAssert(this.isBuilt());
      try {
        this.impl_.onLayoutMeasure();
      } catch (e) {
        reportError(e, this);
      }
    }

    /**
     * @return {?Element}