GitLab

This is a reland of 2fb9ab54:

FIX: change test type from windowed to console for
midi_unittests

Original change's description:
> xvfb: Wait for ReparentNotify before executing tests.
>
> X11 tests can fail because start up of OpenBox is not
> synchronous and it is unknown when exactly it starts up.
>
> That results in a client that uses X11 missing events
> and flakiness of tests.
>
> Thus, to avoid that issue, use a small program that
> creates a dummy X11 windows and waits for the
> ReparentNotify event. That is, OpenBox decorates
> all the windows once it is initialized that results
> in that event. Once the event is received, we can
> be sure that the WM is up and running, and tests
> can be executed.
>
> Bug: 1078771
> Change-Id: Ic6fae30a706a6b9c32e4670da56457c833b4b7f9
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2214526
> Reviewed-by: Nico Weber <thakis@chromium.org>
> Reviewed-by: Dirk Pranke <dpranke@chromium.org>
> Reviewed-by: Thomas Anderson <thomasanderson@chromium.org>
> Commit-Queue: Maksim Sisov <msisov@igalia.com>
> Cr-Commit-Position: refs/heads/master@{#775001}

Bug: 1078771
Change-Id: I500da8725f1c2d51788fd529d7c45318e5f93a03
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2230463
Commit-Queue: Maksim Sisov <msisov@igalia.com>
Reviewed-by: Dirk Pranke <dpranke@google.com>
Reviewed-by: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#776886}