VERSION
Google Chrome Version: Version 50.0.2661.102 (64-bit)

Operating System: [OS X EI CAPTION 10.11.4 (15E65)]

REPRODUCTION CASE
As we know that incognito windows do not save anything. Because of that function people use incognito windows when they login other computer(like in cyber cafe or friends computer). But I found one way to login in someone account if they use incognito windows. Steps are following. 

Step 1 : open a incognito windows and login to wifi [in my case it is Dell sonic wall]. a popup windows will open to show the status of login time.

Step 2 : Close the original incognito windows.[not popup window]
[problem in chrome is that the popup windows opened is not seems like incognito window]

Step 3 : invite someone and ask him to open new incognito window and login in gmail or facebook.
[popup window of wifi login is seems like normal window so people do not close that]

step 4 : close incognito windows.

Step 5 : Click on "SSLVPN Portal" in popup windows or open new incognito then new incognito will open.

Step 6: open gmail or facebook. the gmail will open without asking username or password.

I think the popup window should have different colour like actual incognito windows so that other people can find out that they have not closed all incognito windows.
 

Deleted: 3 login to security wall.png 399 KB

	3 login to security wall.png 399 KB View Download

Deleted: 4 login status popup windows open.png 475 KB

	4 login status popup windows open.png 475 KB View Download

Deleted: 8 login to gmail.png 474 KB

	8 login to gmail.png 474 KB View Download

Deleted: 10 close incognito.png 653 KB

	10 close incognito.png 653 KB View Download

Deleted: 12 login to gmail [no password needed].png 665 KB

	12 login to gmail [no password needed].png 665 KB View Download