[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 b6d070c53378b4f748eae7069f1b51277058a8f9..68f3d6e207f523282ecb040090a1383679ba297e 100644
--- a/chrome/browser/ui/webui/signin/login_ui_service.h
+++ b/chrome/browser/ui/webui/signin/login_ui_service.h
@@ -79,12 +79,19 @@ class LoginUIService : public KeyedService {
   // chrome://signin to ask the user to sign in to chrome.
   void ShowLoginPopup();
 
+  // Sets the last email used for signing in when a signin error occured.
+  void SetLastLoginErrorEmail(const base::string16& email);
+
   // Displays login results.
   void DisplayLoginResult(Browser* browser, const base::string16& message);
 
   // Gets the last login result set through |DisplayLoginResult|.
   const base::string16& GetLastLoginResult();
 
+  // Gets the last email used for signing in when a signin error occured; set
+  // through |SetLastLoginEmail|.
+  const base::string16& GetLastLoginErrorEmail();
+
  private:
   // Weak pointers to the recently opened UIs, with the most recent in front.
   std::list<LoginUI*> ui_list_;
@@ -96,6 +103,7 @@ class LoginUIService : public KeyedService {
   base::ObserverList<Observer> observer_list_;
 
   base::string16 last_login_result_;
+  base::string16 last_login_error_email_;
 
   DISALLOW_COPY_AND_ASSIGN(LoginUIService);
 };