Add username of account that has an auth error.

components/signin/core/browser/fake_auth_status_provider.h

Index: components/signin/core/browser/fake_auth_status_provider.h
diff --git a/components/signin/core/browser/fake_auth_status_provider.h b/components/signin/core/browser/fake_auth_status_provider.h
index 91f10240ee600f86d396f254fa14e77801601f86..b35bc6e1f4b177bdd9dec09528423ee99c07b457 100644
--- a/components/signin/core/browser/fake_auth_status_provider.h
+++ b/components/signin/core/browser/fake_auth_status_provider.h
@@ -19,6 +19,7 @@ class FakeAuthStatusProvider
   // Sets the auth error that this provider reports to SigninErrorController.
   // Also notifies SigninErrorController via AuthStatusChanged().
   void SetAuthError(const std::string& account_id,
+                    const std::string& username,
                     const GoogleServiceAuthError& error);
 
   void set_error_without_status_change(const GoogleServiceAuthError& error) {
@@ -27,11 +28,13 @@ class FakeAuthStatusProvider
 
   // AuthStatusProvider implementation.
   virtual std::string GetAccountId() const OVERRIDE;
+  virtual std::string GetUsername() const OVERRIDE;
   virtual GoogleServiceAuthError GetAuthStatus() const OVERRIDE;
 
  private:
   SigninErrorController* error_provider_;
   std::string account_id_;
+  std::string username_;
   GoogleServiceAuthError auth_error_;
 };