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">


if (createQuadrilaterals) {
      this.quadrilaterals = this._createQuadrilaterals(ignoreBorder);
    }
  }
  /**
   * Create an empty container for the annotation's HTML element.
   *
   * @private
   * @param {boolean} ignoreBorder
   * @memberof AnnotationElement
   * @returns {HTMLSectionElement}
   */
  _createContainer(ignoreBorder = false) {
    const data = this.data,
      page = this.page,
      viewport = this.viewport;
    const container = document.createElement("section");
    let width = data.rect[2] - data.rect[0];
    let height = data.rect[3] - data.rect[1];
    container.setAttribute("data-annotation-id", data.id);
    
    
    const rect = Util.normalizeRect([
      data.rect[0],
      page.view[3] - data.rect[1] + page.view[1],
      data.rect[2],
      page.view[3] - data.rect[3] + page.view[1],
    ]);
    container.style.transform = `matrix(${viewport.transform.join(",")})`;
    container.style.transformOrigin = `${-rect[0]}px ${-rect[1]}px`;