Chrome Version: 66.0.3359.181 (Official Build) (64-bit)
Chrome OS Version: N/A
Chrome OS Platform: N/A
Network info: N/A

Please specify Cr-* of the system to which this bug/feature applies (add
the label below).

Steps To Reproduce:
(1) Open gmail within Chrome
(2) Open email with PDF attachment
(3) Click download arrow

Expected Result: PDF file should download automatically to user's download folder

Actual Result: Nothing happens.  File is not downloaded, no error indication

How frequently does this problem reproduce? (Always, sometimes, hard to
reproduce?) Always

What is the impact to the user, and is there a workaround? If so, what is
it?  Multiple clicks needed for the workaround - Have to right click the attachment thumbnail and click 'Save link as...' and choose the save location

Please provide any additional information below. Attach a screen shot or
log if possible.

For graphics-related bugs, please copy/paste the contents of the about:gpu
page at the end of this report.