Attach (recommended) or Link to PDF file here:
https://drive.google.com/open?id=1UjLxnFw2g3gn3tvNLRYLdmG6mFdFKCcr

Configuration:
- Web browser and its version: Chrome 77.0.3865.90
- Operating system and its version: Mac mojave 10.14.6
- PDF.js version: 2.3.194
- Is a browser extension: Nope

Steps to reproduce the problem:
1. Make sure to set `renderInteractiveForms` to `true`
2. The read-only form field(Sample title) doesn't honor it's proper font-size

What is the expected behavior?
<img width="862" alt="write" src="https://user-images.githubusercontent.com/4616548/66152094-4a009a80-e64b-11e9-81dc-178068055efa.png">

What went wrong?
<img width="842" alt="wrong" src="https://user-images.githubusercontent.com/4616548/66152100-4d942180-e64b-11e9-91a8-ad9caf451f98.png">


* @private
   * @param {string} className
   * @memberof AnnotationElement
   * @returns {Array<HTMLSectionElement>}
   */
  _renderQuadrilaterals(className) {
    if (
      typeof PDFJSDev === "undefined" ||
      PDFJSDev.test("!PRODUCTION || TESTING")
    ) {
      assert(this.quadrilaterals, "Missing quadrilaterals during rendering");
    }
    this.quadrilaterals.forEach(quadrilateral => {
      quadrilateral.className = className;
    });
    return this.quadrilaterals;
  }
  /**
   * Render the annotation's HTML element(s).
   *
   * @public
   * @memberof AnnotationElement
   * @returns {HTMLSectionElement|Array<HTMLSectionElement>}
   */
  render() {
    unreachable("Abstract method `AnnotationElement.render` called");
  }
}
class LinkAnnotationElement extends AnnotationElement {
  constructor(parameters) {