Don't show network config UI when networkingPrivate.startConenct fails

extensions/browser/api/networking_private/networking_private_chromeos.h

Index: extensions/browser/api/networking_private/networking_private_chromeos.h
diff --git a/extensions/browser/api/networking_private/networking_private_chromeos.h b/extensions/browser/api/networking_private/networking_private_chromeos.h
index 1818a6238af1c688f7c4895b3e102af8637b0613..c8193f3a55b39382cf0de1a037d47e1e6514402d 100644
--- a/extensions/browser/api/networking_private/networking_private_chromeos.h
+++ b/extensions/browser/api/networking_private/networking_private_chromeos.h
@@ -117,15 +117,6 @@ class NetworkingPrivateChromeOS : public NetworkingPrivateDelegate {
   void SetManagedActiveProxyValues(const std::string& guid,
                                    base::DictionaryValue* dictionary);
 
-  // Handles connection failures, possibly showing UI for configuration
-  // failures, then calls the appropriate callback.
-  void ConnectFailureCallback(
-      const std::string& guid,
-      const VoidCallback& success_callback,
-      const FailureCallback& failure_callback,
-      const std::string& error_name,
-      std::unique_ptr<base::DictionaryValue> error_data);
-
   content::BrowserContext* browser_context_;
   base::WeakPtrFactory<NetworkingPrivateChromeOS> weak_ptr_factory_;