Version: 52.0.2720.0 
OS: Ubuntu 12.04,14.04,Windows

Precondition: 
1.Enable 'Material Design User Manager' flag from 'chrome://flags'
2.Create one supervised User say "Person 1" 

What steps will reproduce the problem?
(1)Launch chrome -> Sign into Profile-> click on avatar icon 
(2)Now click on 'Switch person' option for User Manager window-> Select 'ADD PERSON' -> Now Check the 'Supervise this person...' checkbox ->Select account 
(3)Create supervised user with the same Name(Person 1) and click on "SAVE" Button -> Now  click on "import Person 1" link beside the Alert Message and observe(Please refer screenshot and Video)

Expected: Should be able to  navigate to "Person 1(Supervised User)" page On clicking "import Person 1" link beside the Alert Message

Actual: Instead Unnecessary "Import an existing supervised user" overlay is seen

This is Non-Regression Issue seen as link "import Person 1" is able to click from Build 52.0.2716.0  and also "Import an existing supervised user" link is available from 52.0.2716.0

Note: 1.In Chrome://Settings page On clicking "import Person 1" link  navigated directly to  "Person 1(Supervised User)" page (Please refer "Expected_Import" Video)and where as overlay is seen only on clicking "Import an existing supervised user" link

Below is the MANUAL CHANGELOG URL:
https://chromium.googlesource.com/chromium/src/+log/52.0.2715.0..52.0.2716.0?pretty=fuller&n=10000

Suspecting https://codereview.chromium.org/1901853002 from Manual Changelog

@mahmadi : Please feel free to re-assign if its not related to your change
 

Deleted: Actual_Import.ogv 2.2 MB

Actual_Import.ogv 2.2 MB Download

Deleted: Expected_Import.ogv 1.7 MB

Expected_Import.ogv 1.7 MB Download