Support Lighthouse CLI

[kiddliu]

Is your feature request related to a problem? Please describe. I want to run Lighthouse CLI with a WebView2 app. When the remote debugging is enabled with --remote-debugging-port, Lighthouse can successfully run but the result is not good enough:

1. Lighthouse creates a new WebView2 Window to gather all the runner results but there is no way to intercept this Window to AddHostObjectToScript.
2. With a little effort I make Lighthouse runs with the existing WebView2 Window, but Lighthouse cannot drive it to navigate the target, reporting a NO_FCP error.
3. Occasionally, Lighthouse CLI reports You probably have multiple tabs open to the same origin. even with a single WebView2 Window

Describe the solution you'd like and alternatives you've considered

• Provide an event handler when a new Window is created via DevTool protocol
• Fix problems 2 and 3

AB#40379026

[victorthoang]

Thanks for the feedback! We've added this as a scenario on our backlog!