GitLab

This is a follow up to https://crrev.com/c/2508132, where
the capability of firing tablet state changes was added to
EXO, via zaura_shell extension.

It wraps the current ui::WaylandConnection::zaura_shell_ instance
so that adding capabilities to listen to compositor event is easier
(see crrev.com/c/2491517 in relation chain).
No behavior change expected.

BUG=1113900

R=jamescook@chromium.org, rjkroege@chromium.org

Change-Id: I2f6e83d53ae05b5674dd2dfc9d7fe146cfd8e18c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2510932
Commit-Queue: Antonio Gomes <tonikitoo@igalia.com>
Reviewed-by: Robert Kroeger <rjkroege@chromium.org>
Cr-Commit-Position: refs/heads/master@{#823019}