Tests that mobile emulation works.


========== Lighthouse Start Audit State ==========
[x] Performance
[x] Progressive Web App
[x] Best practices
[x] Accessibility
[x] SEO
[ ] Publisher Ads
[x] Clear storage
[x] Simulated throttling
Generate report: enabled visible

=============== Lighthouse Results ===============
URL: http://127.0.0.1:8000/devtools/lighthouse/resources/lighthouse-emulate-pass.html
Version: 6.0.0
TestedAsMobileDevice: true
ViewportDimensions: {
  "innerWidth": 360,
  "innerHeight": 640,
  "outerWidth": 360,
  "outerHeight": 640,
  "devicePixelRatio": 3
}


content-width: pass 

