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 a0225d0b7d3849fbef984d7f4d75553616cbfbaa..8782d90be40482cd4df5661092232ccee25ae6e4 100644
--- a/chromeos/dbus/shill_client_helper.h
+++ b/chromeos/dbus/shill_client_helper.h
@@ -79,6 +79,12 @@ 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 ObjectPathCallback& callback,
+      const ErrorCallback& error_callback);
+
   // Calls a method with a dictionary value result.
   void CallDictionaryValueMethod(dbus::MethodCall* method_call,
                                  const DictionaryValueCallback& callback);
@@ -128,6 +134,12 @@ class ShillClientHelper {
   void OnObjectPathMethod(const ObjectPathDBusMethodCallback& callback,
                           dbus::Response* response);
 
+  // Handles responses for methods with ObjectPath results.
+  void OnObjectPathMethodWithoutStatus(
+      const ObjectPathCallback& callback,
+      const ErrorCallback& error_callback,
+      dbus::Response* response);
+
   // Handles responses for methods with DictionaryValue results.
   void OnDictionaryValueMethod(const DictionaryValueCallback& callback,
                                dbus::Response* response);