This does not work with `ArrayBuffer` out of the box and will need to be
investigated and tested more before switching.
Some APIs also seemed to have changed:
- Before (OOP): `new textsecure.protobuf.WebSocketMessage(…).encode();`
- After (functional):
```
textsecure.protobuf.WebSocketMessage.encode(
new textsecure.protobuf.WebSocketMessage(…)
);
```
This reverts commit d758119d9de4f99742ea941e86180b1d600c2f22.
ba4d8952c6