Chrome Version       : 54.0.2840.99 (Official Build) m (32-bit) Windows 

What steps will reproduce the problem?
(1) Chrome is set as the default program for viewing a pdf.
(2) A pdf is in a directory that contains the '#' character.
(3) Attempt to open pdf.

What is the expected result?

The '#' should be replaced with "%23" in the address bar so that the pdf is displayed in the browser.

What happens instead?

Instead the '#' character is still there so the url is wrong and results in ERR_FILE_NOT_FOUND.