[Signin Error Dialog] (3/3) Added the triggering code

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 6f6ecad91e4e70773e35741c59184f06fcdd0948..21f0cc6777d59135850fea8d8437769ab8ce4f4a 100644
--- a/chrome/browser/ui/webui/signin/login_ui_service.h
+++ b/chrome/browser/ui/webui/signin/login_ui_service.h
@@ -80,7 +80,9 @@ class LoginUIService : public KeyedService {
   void ShowLoginPopup();
 
   // Displays login results.
-  void DisplayLoginResult(Browser* browser, const base::string16& message);
+  void DisplayLoginResult(Browser* browser,

[tommycli, 2016/09/20 17:48:05]

I assume this displays a "success" dialog if there's an empty error_message and
an "error" dialog if it's populated? If so, can we add a bit of explanatory
comments?

[anthonyvd, 2016/09/21 15:07:24]

Done.

+                          const base::string16& error_message,
+                          const base::string16& email);
 
   // Gets the last login result set through |DisplayLoginResult|.
   const base::string16& GetLastLoginResult() const;