Migrate ProtocolMonitor.js to TypeScript
Migrate ProtocolMonitor.js to TypeScript

Bug: 1011811
Change-Id: Icf994e61ae9e73e94c4b007fb99c8b79af2091a7
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2456107
Commit-Queue: Alex Rudenko <d8d88e7d7e77f69e23d1d1432231196fb8e02a62@chromium.org>
Reviewed-by: Tim van der Lippe <dba8716ee7f8d16236046f74d2167cb94410f6ed@chromium.org>

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