UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.102 Safari/537.36

Steps to reproduce the problem:
Linux currently has many PDF readers, provided by different DEs, but there's no single one that can be called more or less complete. But Chrome's PDF plugin can bridge the gaps between them. One of the features I find missing is the navigating back and forth within the PDF. This is particularly useful when clicking on a link to a different section of the document and then later jumping back to the previous location. 

What is the expected behavior?

What went wrong?
On Adobe PDF reader, the short cut would be Alt+LeftArrow and Alt+RightArrow, but these in Chrome navigates away from the page/PDF document itself. The back and forward buttons in Firefox's PDF viewer however works as expected (except for resetting zoom settings, which Chrome thankfully doesn't).

Please provide buttons/widgets or keyboard short cuts to navigate within the PDF document.

Did this work before? N/A 

Chrome version: 50.0.2661.102  Channel: stable
OS Version: Linux Mint
Flash Version: Shockwave Flash 21.0 r0

Please make this improvement to the PDF plugin