[Bug]: Fullscreen permission handling doesn't work for WebContentsView

[andreasdj]

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 a bug report that matches the one I want to file, without success.

Electron Version

30.0.1

What operating system are you using?

Windows

Operating System Version

Windows 10 Enterprise version 22H2

What arch are you using?

x64

Last Known Working Electron version

No response

Expected Behavior

When adding a permission request handler to a session used by a WebContentsView, then it is possible to allow elements to go into fullscreen mode.

Actual Behavior

The registered permission request handler is called but when the callback method is invoked nothing happens.

Testcase Gist URL

https://gist.github.com/8cebc0fe88155d5310930cfb3bcc25c7

Additional Information

Although the deprecated BrowserView is said to be a shim on top of the WebContentsView, the permission handling is working for the BrowserView. The provided gist contains buttons to request going into fullscreen mode for the main window and for two child views (one using a BrowserView, another using a WebContentsView).

I have only done tests specifically for fullscreen permission requests but it's possible that this is applicable to all types of permission requests.