Chrome Version: 64.0.3259.0
OS: Windows

What steps will reproduce the problem?
(1) Download a file (e.g. the screenshot attached to this bug)

What is the expected result?
The download button should have a truncated title so that the beginning and end of the file name (including the file extension) fit into the button.

What happens instead?
The file name before the file extension gets truncated, but the file extension also gets truncated. As a result there are two ellipses in the button title.

Mac ran into the same problem ( issue 764546 ), maybe a similar cause?
 

Deleted: Screen Shot 2017-09-13 at 12.52.31 PM.png 14.1 KB

	Screen Shot 2017-09-13 at 12.52.31 PM.png 14.1 KB View Download