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">


viewport: parameters.viewport,
        linkService: parameters.linkService,
        downloadManager: parameters.downloadManager,
        imageResourcesPath: parameters.imageResourcesPath || "",
        renderInteractiveForms:
          typeof parameters.renderInteractiveForms === "boolean"
            ? parameters.renderInteractiveForms
            : true,
        svgFactory: new DOMSVGFactory(),
        annotationStorage:
          parameters.annotationStorage || new AnnotationStorage(),
        enableScripting: parameters.enableScripting,
        hasJSActions: parameters.hasJSActions,
        mouseState: parameters.mouseState || { isDown: false },
      });
      if (element.isRenderable) {
        const rendered = element.render();
        if (data.hidden) {
          rendered.style.visibility = "hidden";
        }
        if (Array.isArray(rendered)) {
          for (const renderedElement of rendered) {
            parameters.div.appendChild(renderedElement);
          }
        } else {
          if (element instanceof PopupAnnotationElement) {
            
            
            parameters.div.prepend(rendered);
          } else {