Version: 66.0.3340.0 (Official Build) Revisioncf4b77e4ccc0da994c6322f71863b0d17bb5c99f-refs/heads/master@{#534315}(32/64-bit)
OS: Windows (7,8,8.1,10),Linux (14.04 LTS),Mac OS X(10.12.6,10.13.1,10.13.3)

What steps will reproduce the problem?
1. Launch chrome,navigate to 'Guest' user and type chrome://md-settings(Page is not in use hence not working) in omnibox and press 'Enter' key.
2. Now observe omnibox behavior immediately 
 
Actual: Omnibox url gets vanished for first instance while loading page
Expected: Omnibox url should be seen properly while loading page

This is regression issue, broken in ‘M 63’ and below is the bisect info :
Good build: 63.0.3219.0  (Revision: 502729).
Bad build: 63.0.3220.0 (Revision: 502993).

You are probably looking for a change made after 502979 (known good), but no later than 502980 (first known bad).

CHANGELOG URL:

The script might not always return single CL as suspect as some perf builds might get missing due to failure.

https://chromium.googlesource.com/chromium/src/+log/f30a17dbc29e1fa98bd115fe33c3aa3c450df9a9..a1faa2513edcd16d4c60861bfa34a48c58e69502

Suspect : https://chromium.googlesource.com/chromium/src/+/a1faa2513edcd16d4c60861bfa34a48c58e69502

From the CL above, assigning the issue to the concern owner 

@dbeam- Could you please check whether this is caused with respect to your change, if not please help us in assigning it to the right owner.

Thanks!

The above issue is also seen on Stable/Beta build #64.0.3282.140 and Dev build #65.0.3325.31
 

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