The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/6fa5f391e5d0756a996803ed9c643848f8144b09

commit 6fa5f391e5d0756a996803ed9c643848f8144b09
Author: Daniel Zhang <oxyflush@google.com>
Date: Thu Sep 13 18:58:31 2018

cros: Fix SearchResultOpenType histogram description

Histogram description stated that the metric was recorded
per click of a search result. However, the metric is
recorded upon the opening of a search result
regardless of whether or not it was clicked.

Bug:  883131 
Change-Id: Ia29dfeab3b943317e7f49b084a352a3ebe182843
Reviewed-on: https://chromium-review.googlesource.com/1219940
Commit-Queue: Daniel Zhang <oxyflush@google.com>
Reviewed-by: Jesse Doherty <jwd@chromium.org>
Cr-Commit-Position: refs/heads/master@{#591098}
[modify] https://crrev.com/6fa5f391e5d0756a996803ed9c643848f8144b09/tools/metrics/histograms/histograms.xml