FYI: ESC/P-R is distributed as a component.

Instructions for distributing and updating component

go/glfay

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/overlays/chromiumos-overlay/+/967a98f95ff20482db3335f65e4580bbd348959b

commit 967a98f95ff20482db3335f65e4580bbd348959b
Author: Piotr Pawliczek <pawliczek@chromium.org>
Date: Fri Aug 31 18:21:32 2018

New version of filters for Epson printers.

This package was deployed on Pantheon server at the location
chrome-component-epson-inkjet-printer-escpr/1.6.23.1/ .

BUG= chromium:869939 
TEST=Tested on veyron_minnie with the autotest platform_PrinterPpds

Change-Id: I74133d58268da473782cfcc702140b740a7a4e53
Reviewed-on: https://chromium-review.googlesource.com/1198162
Commit-Ready: Piotr Pawliczek <pawliczek@chromium.org>
Tested-by: Piotr Pawliczek <pawliczek@chromium.org>
Reviewed-by: Xiaochu Liu <xiaochu@chromium.org>

[modify] https://crrev.com/967a98f95ff20482db3335f65e4580bbd348959b/net-print/epson-inkjet-printer-escpr/files/manifest.json
[modify] https://crrev.com/967a98f95ff20482db3335f65e4580bbd348959b/net-print/epson-inkjet-printer-escpr/Manifest
[delete] https://crrev.com/d6d937698aaca5bf16a57ee4b17e36a6c1458697/net-print/epson-inkjet-printer-escpr/epson-inkjet-printer-escpr-1.6.10-r2.ebuild
[add] https://crrev.com/967a98f95ff20482db3335f65e4580bbd348959b/net-print/epson-inkjet-printer-escpr/epson-inkjet-printer-escpr-1.6.23-r1.ebuild
[rename] https://crrev.com/967a98f95ff20482db3335f65e4580bbd348959b/net-print/epson-inkjet-printer-escpr/epson-inkjet-printer-escpr-1.6.23.ebuild

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/50cdcbc9616fe92038f1e55b6ceba6a54580baa3

commit 50cdcbc9616fe92038f1e55b6ceba6a54580baa3
Author: Piotr Pawliczek <pawliczek@chromium.org>
Date: Tue Sep 11 21:51:50 2018

New version of a component with filters for Epson printers.

It is an update of required version number of the component.
The current version number of the package is 1.6.23.2 .

BUG= chromium:869939 
TEST=Tested on nautilus with the autotest platform_PrinterPpds

Change-Id: I4c16d960640cb7e8e30e49653451bce0ff51c517
Reviewed-on: https://chromium-review.googlesource.com/1212445
Reviewed-by: Joshua Pawlicki <waffles@chromium.org>
Reviewed-by: Sean Kau <skau@chromium.org>
Commit-Queue: Piotr Pawliczek <pawliczek@chromium.org>
Cr-Commit-Position: refs/heads/master@{#590494}
[modify] https://crrev.com/50cdcbc9616fe92038f1e55b6ceba6a54580baa3/chrome/browser/component_updater/cros_component_installer_chromeos.cc