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">


constructor(parameters) {
    super(parameters, { isRenderable: parameters.renderInteractiveForms });
  }
  render() {
    this.container.className = "choiceWidgetAnnotation";
    const storage = this.annotationStorage;
    const id = this.data.id;
    
    
    
    
    
    
    
    storage.getOrCreateValue(id, {
      value:
        this.data.fieldValue.length > 0 ? this.data.fieldValue[0] : undefined,
    });
    const selectElement = document.createElement("select");
    selectElement.disabled = this.data.readOnly;
    selectElement.name = this.data.fieldName;
    selectElement.setAttribute("id", id);
    if (!this.data.combo) {
      
      selectElement.size = this.data.options.length;
      if (this.data.multiSelect) {
        selectElement.multiple = true;