commit 1ec338a7f29b26c0e6ae4c5c276d6014e00b77c9
author mhashmi <mhashmi@chromium.org> Tue Oct 25 22:13:34 2016
committer Commit bot <commit-bot@chromium.org> Tue Oct 25 22:17:30 2016
tree 634d76bcc99069ede23359fb8365f2cccb1efdb0
parent 5d7a12ee67894a3922028c52918c119a284ace91

Add ui devtools server

Implement a basic devtools server for mus/ash in order to inspect the window
server tree hierarchy from a chrome devtools client. This can be enabled
by starting chrome with the flag --enable-ui-devtools=<port>.
With this implementation, a basic server that only communicates with web
sockets is started. It responds with the hierarchy when the devtools
client connects.

BUG=648701
CQ-DEPEND=CL:2365283003

Review-Url: https://codereview.chromium.org/2374513002
Cr-Commit-Position: refs/heads/master@{#427506}