"--ignore-connections-limit" commandLine switch stopped working in Electron@7

[Kilian]

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: 7.1.2
• Operating System: Ubuntu 18.04 x64
• Last Known Working Electron version: 6.x

Expected Behavior

Setting the "ignore-connections-limit" commandLine switch for localhost should allow more than 4 connections to e.g. the gatsby development server, which limits it to that number. This is the behaviour in Electron@6

Actual Behavior

The "ignore-connections-limit" seems to have no effect anymore in electron@7.

To Reproduce

1. Run a gatsby local server, like https://github.com/gatsbyjs/gatsby-starter-hello-world
2. Launch this fiddle with electron@6, and see that all 6 iframes load the site: https://gist.github.com/Kilian/d35badc28200c3229b1028243433cf54
3. Launch the fiddle with electron@7, see that none of the iframes load anymore
4. Remove two iframes, launch with electron@7, see that the iframes now do load

Note

Note that our documentation still mentions the flag as working: https://electronjs.org/docs/api/chrome-command-line-switches#--ignore-connections-limitdomains

[nornagon]

I don't think ignore-connections-limit was ever a Chrome switch. Looks like it got inadvertently removed here: #19644

[deepak1556]

Yeah its not a chrome switch, and yup its accidentally removed there.

[Kilian]

ref: https://github.com/electron/electron/pull/19644/files#diff-8c1eed0d78f8872226e8dd910fccb551L245

Can it be re-introduced in the new classes?