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">


break;
        default:
          break;
      }
      if (data.color) {
        container.style.borderColor = Util.makeHexColor(
          data.color[0] | 0,
          data.color[1] | 0,
          data.color[2] | 0
        );
      } else {
        
        container.style.borderWidth = 0;
      }
    }
    container.style.left = `${rect[0]}px`;
    container.style.top = `${rect[1]}px`;
    container.style.width = `${width}px`;
    container.style.height = `${height}px`;
    return container;
  }
  /**
   * Create quadrilaterals from the annotation's quadpoints.
   *
   * @private
   * @param {boolean} ignoreBorder
   * @memberof AnnotationElement
   * @returns {Array<HTMLSectionElement>}
   */
  _createQuadrilaterals(ignoreBorder = false) {