Chrome Version: 65.0.3299.0/10271.0.0 dev-channel Peach-Pit,Jerry and Swanky
OS: Chrome

What steps will reproduce the problem?
(1)Sign into User ->Insert Mobile Dongle and ensure it is connected
(2)Now go to chrome://settings page -> At Internet Connection click on Cellular connection -> Navigates to Cellular connected page
(3)Now Enable 'Enable SIM Card locking(require PIN to use Mobile data) option -> 'ENTER SIM PIN' Dialog box is seen -> observe for 'Cancel' button (Please refer Screenshot)

Expected: 'Cancel' button should be available in 'ENTER SIM PIN' Dialog box 
Actual : 'Cancel' button is seen missing

This is Regression issue as same is working fine in old settings page i.e.  'Cancel' button is available in 'ENTER SIM PIN' Dialog box

@stevenjb : Please confirm the behavior
 

Deleted: Actual_NoCancelButton.png 138 KB

	Actual_NoCancelButton.png 138 KB View Download

Deleted: Expected_CancelButton.jpg 80.7 KB

	Expected_CancelButton.jpg 80.7 KB View Download