tree 34a93deee438c87bbfd77e057dbdb3cf7f732401
parent 73fb3523da880830c2cf1879a11f521a4ecc41d3
author Ed Coyne <edcoyne@google.com> 1555976205 +0000
committer CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org> 1555976205 +0000

[virtcon] Make virtcon host a fidl service for sessions.

(Second attempt, previous try at:
I09e66a7c5bc91fb41b6bfb99510b5be1aa609d57

reverted before due to race condition due to async fidl
call).

the virtcon (virtual-console) binary used to provide new sessions
through a convoluted path through device coordinator. This will make it
expose a fidl service directly for clients to request a new session.

This removes device coordinator from the operational loop and will make
it easy for the virtual-console binary to stand on it's own once we have
something else to start it.

It is a little messy due to the virtcon binary using the "port" library
heavily and fidl being built around the async_loop.

Test:
* Booted the following 3 times and verified that all three virtcons
appear and are interactive:
  * vim2
  * eve
  * qemu
  * qemu w/ KVM
* Tested qemu with virtcon.disable=true
* Tested qemu with zircon-only build (zircon/scripts/run-zircon-x64 -b
-g -k).

ZX-3403 # Get virtcon out of the way.

Change-Id: I708dc16a162e87838498afa5a38c4a5a0d9a3cf2