UserAgent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3455.0 Safari/537.36

Steps to reproduce the problem:
Compare the next two cases.

What is the expected behavior?
1. Open https://example.org/ in the last dev branch (69.0.3452.0).
2. Enter `document.querySelector('a:matches([href])')` in the console.
3. See the result:

<a href="http://www.iana.org/domains/example">More information...</a>

What went wrong?
1. Open https://example.org/ in the last canary branch (69.0.3455.0).
2. Enter `document.querySelector('a:matches([href])')` in the console.
3. See the error:

Uncaught DOMException: Failed to execute 'querySelector' on 'Document': 'a:matches([href])' is not a valid selector.
    at <anonymous>:1:10

Did this work before? Yes At least the last dev branch (69.0.3452.0)

Chrome version: 69.0.3455.0  Channel: canary
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)
Flash Version: 30.0.0.113