The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/overlays/portage-stable/+/47366d42ecf8e3e763e14f45c5d2d2c590250f3f

commit 47366d42ecf8e3e763e14f45c5d2d2c590250f3f
Author: Benjamin Gordon <bmgordon@chromium.org>
Date: Tue May 22 19:56:24 2018

gdk-pixbuf: Explicitly inherit eutils

The new version of versionator.eclass coming in crrev.com/c/1065027 no
longer implicitly inherits eutils, but gdk-pixbuf needs functions from
it.  We should ideally upgrade gdk-pixbuf instead of patching this
ebuild, but that requires a large number of additional dependent eclass
upgrades (tracked in  crbug.com/845181 ).  Directly inherit eutils as a
temporary workaround.

BUG= chromium:845181 ,  chromium:844166 
TEST=emerge-grunt gdk-pixbuf

Change-Id: I48aa4b2bfe479cbd78e8ae744f4453cd324ebac9
Reviewed-on: https://chromium-review.googlesource.com/1066086
Commit-Ready: Benjamin Gordon <bmgordon@chromium.org>
Tested-by: Benjamin Gordon <bmgordon@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>

[modify] https://crrev.com/47366d42ecf8e3e763e14f45c5d2d2c590250f3f/x11-libs/gdk-pixbuf/gdk-pixbuf-2.22.1-r2.ebuild
[rename] https://crrev.com/47366d42ecf8e3e763e14f45c5d2d2c590250f3f/x11-libs/gdk-pixbuf/gdk-pixbuf-2.22.1-r5.ebuild

Hi Ben,

My interns for the summer Salud and Victor (cc'd) ran into this same issue as a package they're trying to bring in depends on the upstream version of gdk-pixbuf too.

Do you have a list of known upgrades that could help unblock them?

I'm back from leave now.  Do you still need a list?  When I looked at this before, I believe I started with gnome2.eclass and just started tracing what broke.

Hello, Salud and I have been trying to incorporate FWUPD into Chrome OS crbug.com/857263. 
FWUPD depends on the upstream version of gdk-pixbuf. Salud and I were able to get gdk-pixbuf to emerge onto eve with the following CLs:
https://chromium-review.googlesource.com/c/chromiumos/overlays/chromiumos-overlay/+/1145557
https://chromium-review.googlesource.com/c/chromiumos/overlays/chromiumos-overlay/+/1145556

However, it seems that the package needs more patches (or maybe any local patches) to get to work. When the package is loaded onto a board, gdk-pixbuf-query-loaders gives the following warning: 
g_module_open() failed for /usr/lib64/gdk-pixbuf-2.0/2.10.0/loaders/libpixbufloader-bmp.so: /usr/lib64/gdk-pixbuf-2.0/2.10.0/loaders/libpixbufloader-bmp.so: undefined symbol: gdk_pixbuf_calculate_rowstride

Did you put it on with cros deploy or by building an image?  That looks like the sort of error that might come from needing to rebuild a dependent package.

Correct, I used cros deploy. What packages should I rebuild?

This was completed in https://crrev.com/c/1345476