GitLab

Create a server socket on the browser process and pass it to the viz
process, where the Viz DevTools server is created.

The server is enabled with the flag --enable-viz-devtools=<port>. If no
port is specified, the default 9229 is used.

Once running, you can connect to the server with the following url:
chrome-devtools://devtools/bundled/inspector.html?ws=localhost:9229/0

The viz devtools server should be connected on Android and when it runs
in-process, but these haven't been tested yet.

Bug: 816802
Change-Id: Ica6b98253b49e0658a680a71fa3fe7ad083610a9
Reviewed-on: https://chromium-review.googlesource.com/c/1309135
Commit-Queue: Sean Gilhuly <sgilhuly@chromium.org>
Reviewed-by: Sadrul Chowdhury <sadrul@chromium.org>
Reviewed-by: kylechar <kylechar@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Antoine Labour <piman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#607754}