Chrome Version: 70.0.3502.0/10914.0.0 dev channel Celes,Kip
OS: Chrome

What steps will reproduce the problem?
Sample URL : http://www.sample-videos.com/

What steps will reproduce the problem?
(1)Sign in to user ->Now go to above URL -> download any 'mkv' extension file
(2)Observe black preview icons is seen in 'Thumbnail view' and in 'List view' 
(Please refer video and Screenshot)


Expected: No such black preview icons should be seen in 'Thumbnail view' and in 'List view'
Actual: Instead black preview icons is seen in 'Thumbnail view' and in 'List view'


This is Non-Regression Issue seen seen from  M-62


 

Deleted: Actual_BlackIcon.webm 7.6 MB

	Actual_BlackIcon.webm 7.6 MB View Download