This converts the Shill clients to allow propagation of shill errors

chromeos/dbus/shill_client_helper.h

Index: chromeos/dbus/shill_client_helper.h
diff --git a/chromeos/dbus/shill_client_helper.h b/chromeos/dbus/shill_client_helper.h
index 84534e090c8acafb4e3babdb4ef4e882cf0818e2..bd2deaef5302208794085d17c2f3a46db6e633ad 100644
--- a/chromeos/dbus/shill_client_helper.h
+++ b/chromeos/dbus/shill_client_helper.h
@@ -77,6 +77,12 @@ class ShillClientHelper {
   void CallObjectPathMethod(dbus::MethodCall* method_call,
                             const ObjectPathDBusMethodCallback& callback);
 
+  // Calls a method with an object path result where there is an error callback.
+  void CallObjectPathMethodWithErrorCallback(
+      dbus::MethodCall* method_call,
+      const ObjectPathCallbackWithoutStatus& callback,
+      const ErrorCallback& error_callback);
+
   // Calls a method with a dictionary value result.
   void CallDictionaryValueMethod(dbus::MethodCall* method_call,
                                  const DictionaryValueCallback& callback);
@@ -126,6 +132,11 @@ class ShillClientHelper {
   void OnObjectPathMethod(const ObjectPathDBusMethodCallback& callback,
                           dbus::Response* response);
 
+  // Handles responses for methods with ObjectPath results.
+  void OnObjectPathMethodWithoutStatus(
+      const ObjectPathCallbackWithoutStatus& callback,
+      dbus::Response* response);
+
   // Handles responses for methods with DictionaryValue results.
   void OnDictionaryValueMethod(const DictionaryValueCallback& callback,
                                dbus::Response* response);