Add flag (disabled by default) to switch to EDU Coexistence V2

Bug: 1128446
Change-Id: I6f6616186fd2cb4bf5e6e7a5c422b3b2f052967b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2411653
Commit-Queue: Dan S <[email protected]>
Reviewed-by: Yilkal Abe <[email protected]>
Reviewed-by: Michael Giuffrida <[email protected]>
Cr-Commit-Position: refs/heads/master@{#807601}
diff --git a/chrome/browser/supervised_user/supervised_user_service.h b/chrome/browser/supervised_user/supervised_user_service.h
index 5227473..46b355a 100644
--- a/chrome/browser/supervised_user/supervised_user_service.h
+++ b/chrome/browser/supervised_user/supervised_user_service.h
@@ -159,6 +159,8 @@
 
   bool IsSupervisedUserIframeFilterEnabled() const;
 
+  static std::string GetEduCoexistenceLoginUrl();
+
   // Returns true if the user is a type of Family Link Child account,
   // but will not return true for a Legacy Supervised user (or non child users).
   bool IsChild() const;