Issue 701509  has been merged into this issue.

For some reason this bug didn't get updated, but the fix for this landed yesterday:

https://codereview.chromium.org/2747173003

https://chromium.googlesource.com/chromium/src/+/bdf4447c2b53c291b12eed74bad3bc0aa3c63eff

Please add applicable OSs.  Thanks.

Your change meets the bar and is auto-approved for M58. Please go ahead and merge the CL to branch 3029 manually. Please contact milestone owner if you have questions.
Owners: amineer@(Android), cmasso@(iOS), bhthompson@(ChromeOS), govind@(Desktop)

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/d5dce6b31d87645a8dd64696b1a4f1b9f9152712

commit d5dce6b31d87645a8dd64696b1a4f1b9f9152712
Author: bmcquade <bmcquade@chromium.org>
Date: Fri Mar 17 17:22:56 2017

UKM: log PageTransition and failed provisional load info

BUG= 701372 
NOTRY=true
NOPRESUBMIT=true
TBR=bengr

Review-Url: https://codereview.chromium.org/2747173003
Cr-Commit-Position: refs/heads/master@{#456863}
(cherry picked from commit bdf4447c2b53c291b12eed74bad3bc0aa3c63eff)

Review-Url: https://codereview.chromium.org/2754323002
Cr-Commit-Position: refs/branch-heads/3029@{#268}
Cr-Branched-From: 939b32ee5ba05c396eef3fd992822fcca9a2e262-refs/heads/master@{#454471}

[modify] https://crrev.com/d5dce6b31d87645a8dd64696b1a4f1b9f9152712/chrome/browser/page_load_metrics/observers/ukm_page_load_metrics_observer.cc
[modify] https://crrev.com/d5dce6b31d87645a8dd64696b1a4f1b9f9152712/chrome/browser/page_load_metrics/observers/ukm_page_load_metrics_observer.h
[modify] https://crrev.com/d5dce6b31d87645a8dd64696b1a4f1b9f9152712/chrome/browser/page_load_metrics/observers/ukm_page_load_metrics_observer_unittest.cc