Crash when loading a http only site as https with a webview

[Jelmerro]

Preflight Checklist

• I have read the Contributing Guidelines for this project.
• I agree to follow the Code of Conduct that this project adheres to.
• I have searched the issue tracker for an issue that matches the one I want to file, without success.

Issue Details

• Electron Version:
  • 8.0.0-beta.7, 8.0.0-beta.5 and probably most other electron 8 versions
• Operating System:
  • Fedora 30, Fedora 31 and Ubuntu 18.04
• Last Known Working Electron version:
  • Most if not any version of electron 7, including 7.1.9

Expected Behavior

• Find a website that only supports http
• Set the src attribute of a webview to the https:// version of that website
• Expect electron to throw a ERR_CERT_COMMON_NAME_INVALID error or similar

Actual Behavior

• Find a website that only supports http
• Set the src attribute of a webview to the https:// version of that website
• Electron crashes with exit code 0 and without any logging or errors

To Reproduce

• Set the src attribute of a webview to a https url that will redirect to http
• Example fiddle

This behaviour is also present when trying to set the src attribute at any later stage,
even when doing so from inside the developer tools.

[Jelmerro]

This seems to be fixed in 8.0.1 and beta versions of 9.
PR: #22124