[Signin Error Dialog] (2/3) Added handlers and UI constructors

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..6f6ecad91e4e70773e35741c59184f06fcdd0948 100644
--- a/chrome/browser/ui/webui/signin/login_ui_service.h
+++ b/chrome/browser/ui/webui/signin/login_ui_service.h
@@ -83,7 +83,11 @@ class LoginUIService : public KeyedService {
   void DisplayLoginResult(Browser* browser, const base::string16& message);
 
   // Gets the last login result set through |DisplayLoginResult|.
-  const base::string16& GetLastLoginResult();
+  const base::string16& GetLastLoginResult() const;
+
+  // Gets the last email used for signing in when a signin error occured; set
+  // through |DisplayLoginResult|.
+  const base::string16& GetLastLoginErrorEmail() const;
 
  private:
   // Weak pointers to the recently opened UIs, with the most recent in front.
@@ -96,6 +100,7 @@ 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);
 };