The project was canceled. The metrics should be deprecated as a follow-up of https://chromium-review.googlesource.com/c/chromium/src/+/848193 which removed the implementation.
The following revision refers to this bug: https://chromium.googlesource.com/chromium/src.git/+/511d82542744db6b86686ed115d7fc7893e60514 commit 511d82542744db6b86686ed115d7fc7893e60514 Author: Wenzhao Zang <wzang@chromium.org> Date: Tue Feb 13 00:37:59 2018 cros: Deprecate Android wallpaper app UMA and switch The project was canceled. The is a follow-up of https://chromium-review.googlesource.com/c/chromium/src/+/848193 which removed the implementation. Bug: 810540 Change-Id: Ie7796d7763bff839159aa7c34cc21e74990a8b2a Reviewed-on: https://chromium-review.googlesource.com/900582 Reviewed-by: Jesse Doherty <jwd@chromium.org> Commit-Queue: Wenzhao (Colin) Zang <wzang@chromium.org> Cr-Commit-Position: refs/heads/master@{#536247} [modify] https://crrev.com/511d82542744db6b86686ed115d7fc7893e60514/chrome/browser/about_flags.cc [modify] https://crrev.com/511d82542744db6b86686ed115d7fc7893e60514/chrome/browser/flag_descriptions.cc [modify] https://crrev.com/511d82542744db6b86686ed115d7fc7893e60514/chrome/browser/flag_descriptions.h [modify] https://crrev.com/511d82542744db6b86686ed115d7fc7893e60514/chromeos/chromeos_switches.cc [modify] https://crrev.com/511d82542744db6b86686ed115d7fc7893e60514/chromeos/chromeos_switches.h [modify] https://crrev.com/511d82542744db6b86686ed115d7fc7893e60514/tools/metrics/histograms/histograms.xml
Comment 1 by wzang@chromium.org
, Feb 13 2018