UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36

Steps to reproduce the problem:
1. Open Chrome
2. Start new session as guest
3. Surf to page 1, then page 2 in the same tab
4. Press backspace while focus is in web page.

What is the expected behavior?
Navigates back.

What went wrong?
Does not navigate back.

Did this work before? Yes before v52

Chrome version: 52.0.2743.116  Channel: stable
OS Version: OS X 10.11.6
Flash Version: Shockwave Flash 22.0 r0