Typecheck lighthouse_worker/LighthouseService.js with TypeScript
Typecheck lighthouse_worker/LighthouseService.js with TypeScript

Note that we are blocked on https://github.com/GoogleChrome/lighthouse/issues/11628
to fully run TypeScript on this file.

R=8915f5d5c39a08c5a3e8a8d7314756e4580816f9@chromium.org

Bug: 1011811
Change-Id: I475d7c80c366f9599b695f6a4e961117ae363391
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2547288
Commit-Queue: Tim van der Lippe <dba8716ee7f8d16236046f74d2167cb94410f6ed@chromium.org>
Auto-Submit: Tim van der Lippe <dba8716ee7f8d16236046f74d2167cb94410f6ed@chromium.org>
Reviewed-by: Paul Lewis <8915f5d5c39a08c5a3e8a8d7314756e4580816f9@chromium.org>

ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend