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### Issue Details

* **Electron Version:**
  * 9.1.0
* **Operating System:**
  * macOS Mojave 10.14.6
* **Last Known Working Electron version:**
  * just v9. Because in electron version 9 was introduce "pdf viewer", but now it cant print pdf.

### Expected Behavior
just print correctly the pdf...

### Actual Behavior
when you try to print with "window.print()" a page that load a PDF electron do not respond.... sometimes crash...

### To Reproduce
just clone "electron-quick-start" and replace this line :
 mainWindow.loadFile('index.html') 
 for 
 mainWindow.loadURL('http://www.africau.edu/images/default/sample.pdf')
and replace all content script "preload.js" for:

window.addEventListener('DOMContentLoaded', () => {
  window.print();
});

this is a example repo to reproduce the error: 
https://github.com/rgarcia1990/electron-quick-start

just do the normal setup

$ git clone https://github.com/rgarcia1990/electron-quick-start
$ npm install
$ npm start || electron .

and when the app electron start will popup print dialog, just try to print!

that is all!
shell/renderer/renderer_client_base.cc
content::RenderFrame* render_frame,
    const blink::WebElement& plugin_element,
    const GURL& original_url,
    const std::string& mime_type) {
#if BUILDFLAG(ENABLE_PDF_VIEWER)
  DCHECK(plugin_element.HasHTMLTagName("object") ||
         plugin_element.HasHTMLTagName("embed"));
  
  
  content::WebPluginInfo info;
  info.type = content::WebPluginInfo::PLUGIN_TYPE_BROWSER_PLUGIN;
  info.name = base::UTF8ToUTF16("Chromium PDF Viewer");
  info.path = base::FilePath::FromUTF8Unsafe(extension_misc::kPdfExtensionId);
  info.background_color = content::WebPluginInfo::kDefaultBackgroundColor;
  info.mime_types.emplace_back("application/pdf", "pdf",
                               "Portable Document Format");
  return extensions::MimeHandlerViewContainerManager::Get(
             content::RenderFrame::FromWebFrame(
                 plugin_element.GetDocument().GetFrame()),
             true )
      ->CreateFrameContainer(plugin_element, original_url, mime_type, info);
#else
  return false;
#endif
}
bool RendererClientBase::IsOriginIsolatedPepperPlugin(