UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.78 Safari/537.36

Steps to reproduce the problem:
1. Enable URLWhitelist enterprise policy with values:
myscheme:*
myscheme://*

2. Create Windows URL handler via registry:

-- CUT --
Windows Registry Editor Version 5.00

[HKEY_CLASSES_ROOT\myscheme]
"URL Protocol"=""
@="myscheme"

[HKEY_CLASSES_ROOT\myscheme\DefaultIcon]
@=""

[HKEY_CLASSES_ROOT\myscheme\shell]

[HKEY_CLASSES_ROOT\myscheme\shell\open]

[HKEY_CLASSES_ROOT\myscheme\shell\open\command]
@="calc.exe"
-- CUT --

3. Create test html file:

-- CUT --
<a href='myscheme:test'>test1</a><br /><a href='myscheme://test'>test2</a>
-- CUT --

4. Open test html, click "test1" link, click "test2" link.

What is the expected behavior?
Two instances of Windows calculator should open

What went wrong?
No calculator opens

Did this work before? N/A 

Chrome version: 59.0.3070.86  Channel: stable
OS Version: 7
Flash Version: