"Beginning last month on the Wayland mailing list there was some
activity by a Chromium contributor (example) named Daniel Nicoara.
His messages have continued and just this afternoon submitted a new
patch to fix Wayland's incomplete frame-buffer attachment on GTK
when using the latest GTK3 tool-kit.
Wayland contributions from a Chromium e-mail address isn't too
informative by itself, but when digging a bit deeper is when the
situation becomes more interesting.