Tests that service worker requests are intercepted when DevTools attached after start.
Response before interception enabled: Fetched for real!
[renderer] Request to http://127.0.0.1:8000/inspector-protocol/fetch/resources/service-worker-import.js, type: Script
Imported script after interception enabled: overriden imported script!
[renderer] Request to http://127.0.0.1:8000/inspector-protocol/fetch/resources/empty.html, type: XHR
[renderer] Request to http://127.0.0.1:8000/inspector-protocol/fetch/resources/fetch-data.txt, type: XHR
Response after interception enabled: overriden response body
Stopped service worker
Disconnected from service worker