* refactor: use new extensions Messaging API IPC
Refs CRBUG:993189
Incorporates changes from:
* Bind ServiceWorker associated interfaces on Worker Thread (CL:4929154)
* [extensions] Move WakeEventPage to mojom::RendererHost (CL:4902564)
* [extensions] Convert Extension Messaging APIs over to mojo (CL:4947890)
* [extensions] Port GetMessageBundle over to mojom (CL:4956841)
* 5008635: [extensions] Bind the mojo interfaces to the frame instance
https://chromium-review.googlesource.com/c/chromium/src/+/5008635
