UserAgent: Mozilla/5.0 (X11; CrOS x86_64 11095.0.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3558.0 Safari/537.36
Platform: 11095.0.0 (Official Build) canary-channel cave

Steps to reproduce the problem:
1. Download a PDF
2. Double-click to open in Chrome (if not using external reader)
3. Attempt to scroll

What is the expected behavior?
Scrolling with mouse or arrows should bring PDF from one page to the next.

What went wrong?
Scrolling does not move PDF, document unreadable past page 1

Did this work before? Yes Version prior to this one

Chrome version: 71.0.3558.0  Channel: n/a
OS Version: 11095.0.0
Flash Version: 

This is a pretty self-explanatory bug. Could prove to be a real problem for those who make heavy usage of PDF docs.