Add username of account that has an auth error.

components/signin/core/browser/signin_error_controller.cc

Index: components/signin/core/browser/signin_error_controller.cc
diff --git a/components/signin/core/browser/signin_error_controller.cc b/components/signin/core/browser/signin_error_controller.cc
index 3d3060bc4c49425b9320b3f223abc20c56048252..eb680105d10cb8a2674404d1a71b543ac518a3aa 100644
--- a/components/signin/core/browser/signin_error_controller.cc
+++ b/components/signin/core/browser/signin_error_controller.cc
@@ -62,11 +62,13 @@ void SigninErrorController::AuthStatusChanged() {
     }
 
     std::string account_id = (*it)->GetAccountId();
+    std::string username = (*it)->GetUsername();
 
     // Prioritize this error if it matches the previous |auth_error_|.
     if (error.state() == prev_state && account_id == prev_account_id) {
       auth_error_ = error;
       error_account_id_ = account_id;
+      error_username_ = username;
       error_changed = true;
       break;
     }
@@ -76,6 +78,7 @@ void SigninErrorController::AuthStatusChanged() {
     if (!error_changed) {
       auth_error_ = error;
       error_account_id_ = account_id;
+      error_username_ = username;
       error_changed = true;
     }
   }
@@ -84,6 +87,7 @@ void SigninErrorController::AuthStatusChanged() {
     // No provider reported an error, so clear the error we have now.
     auth_error_ = GoogleServiceAuthError::AuthErrorNone();
     error_account_id_.clear();
+    error_username_.clear();
     error_changed = true;
   }