GitLab

This CL adds a feature to forward gamepad device information to ARC
container. The feature can be enabled by ExoRawGamepad feature flag.

In order to forward the information, this CL adds a new Wayland event
gamepad_added_with_device_info.

This is a part of the effort to improve ARC Gampad compatibility.
Design doc: go/arc-improved-gamepad

TEST=manual(--enable-features=ExoRawGamepad to /etc/chrome_dev.conf)
BUG=b:130597086

Change-Id: If492a8a7a46d1cf321e4e8b3daa94645bb55a7c1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1602193
Commit-Queue: Tetsui Ohkubo <tetsui@chromium.org>
Reviewed-by: Yuichiro Hanada <yhanada@chromium.org>
Reviewed-by: Mitsuru Oshima (slow - gardening) <oshima@chromium.org>
Cr-Commit-Position: refs/heads/master@{#659365}