Add test for showing confirmation dialog for unsecure signin

chrome/browser/ui/webui/signin/login_ui_service.h

Index: chrome/browser/ui/webui/signin/login_ui_service.h
diff --git a/chrome/browser/ui/webui/signin/login_ui_service.h b/chrome/browser/ui/webui/signin/login_ui_service.h
index 709495f705fe80629ded95dc1b50eab4efb27fbc..2ad4d7e8b743a82bffe89b6c89a86212e59c9811 100644
--- a/chrome/browser/ui/webui/signin/login_ui_service.h
+++ b/chrome/browser/ui/webui/signin/login_ui_service.h
@@ -47,6 +47,9 @@ class LoginUIService : public KeyedService {
     // sync starts.
     virtual void OnSyncConfirmationUIClosed(bool configure_sync_first) {}
 
+    // Called when a confirmation UI for untrusted signin is shown.
+    virtual void OnUntrustedLoginUIShown() {}
+
    protected:
     virtual ~Observer() {}
   };
@@ -74,6 +77,9 @@ class LoginUIService : public KeyedService {
   // Called when the sync settings confirmation UI is closed.
   void SyncConfirmationUIClosed(bool configure_sync_first);
 
+  // Called when a confirmation UI for untrusted signin is shown.
+  void UntrustedLoginUIShown();
+
   // Delegate to an existing login dialog if one exists.
   // If not, we make a new popup dialog window, and set it to
   // chrome://signin to ask the user to sign in to chrome.