GitLab

|FidoTunnelDevice| performs a caBLEv2 handshake, and passes CTAP2
messages, across a WebSocket.

BUG=1002262

Change-Id: I0d6e89019aca292a1795b380a9b87b59971733b9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2340388
Commit-Queue: Adam Langley <agl@chromium.org>
Reviewed-by: Martin Šrámek <msramek@chromium.org>
Reviewed-by: Reilly Grant <reillyg@chromium.org>
Reviewed-by: Martin Kreichgauer <martinkr@google.com>
Cr-Commit-Position: refs/heads/master@{#799759}