Allow networkingPrivate to request configure UI

extensions/browser/api/networking_private/networking_private_delegate.h

Index: extensions/browser/api/networking_private/networking_private_delegate.h
diff --git a/extensions/browser/api/networking_private/networking_private_delegate.h b/extensions/browser/api/networking_private/networking_private_delegate.h
index 99b46a0c5997e5e00583ad458021c47b08e62722..c08ff651a9576ff7aad9432613a0bfdedc75d94c 100644
--- a/extensions/browser/api/networking_private/networking_private_delegate.h
+++ b/extensions/browser/api/networking_private/networking_private_delegate.h
@@ -90,6 +90,11 @@ class NetworkingPrivateDelegate : public KeyedService {
     // with |guid|.
     virtual void ShowAccountDetails(const std::string& guid) const = 0;
 
+    // Possibly handle a connection failure, e.g. by showing the configuration
+    // UI. Returns true if the error was handled, i.e. the UI was shown.
+    virtual bool HandleConnectFailed(const std::string& guid,
+                                     const std::string error) const = 0;
+
    private:
     DISALLOW_COPY_AND_ASSIGN(UIDelegate);
   };