The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/8a1c14104a765e1e1a9114a2287791bfd8fc4c27

commit 8a1c14104a765e1e1a9114a2287791bfd8fc4c27
Author: Alex Newcomer <newcomer@chromium.org>
Date: Wed Jun 20 17:26:36 2018

cros: Record shelf context menu user journey time.

Adressing an old TODO, and fixing a bug which recorded shelf menus as
app menus.

Bug: 845273
Bug:  844776 
Change-Id: Ia6156ae597f724631b60909cde68067a9a49ced9
Reviewed-on: https://chromium-review.googlesource.com/1102906
Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Commit-Queue: Alex Newcomer <newcomer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#568895}
[modify] https://crrev.com/8a1c14104a765e1e1a9114a2287791bfd8fc4c27/ash/shelf/shelf_menu_model_adapter.cc

This CL is a metrics bug fix. 

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No need to merge this after all.