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">


(data.actions.Action || data.actions.MouseUp || data.actions.MouseDown) &&
      this.enableScripting &&
      this.hasJSActions
    ) {
      this._bindJSAction(link, data);
    } else {
      this._bindLink(link, "");
    }
    if (this.quadrilaterals) {
      return this._renderQuadrilaterals("linkAnnotation").map(
        (quadrilateral, index) => {
          const linkElement = index === 0 ? link : link.cloneNode();
          quadrilateral.appendChild(linkElement);
          return quadrilateral;
        }
      );
    }
    this.container.className = "linkAnnotation";
    this.container.appendChild(link);
    return this.container;
  }
  /**
   * Bind internal links to the link element.
   *
   * @private
   * @param {Object} link
   * @param {Object} destination
   * @memberof LinkAnnotationElement
   */
  _bindLink(link, destination) {