This converts the Shill clients to allow propagation of shill errors

chromeos/dbus/shill_device_client.h

Index: chromeos/dbus/shill_device_client.h
diff --git a/chromeos/dbus/shill_device_client.h b/chromeos/dbus/shill_device_client.h
index affe2c4a0687698ec6e695c6938fb17fc6879ad4..3240694ae620af9b2acd0b8448b62f53269c3590 100644
--- a/chromeos/dbus/shill_device_client.h
+++ b/chromeos/dbus/shill_device_client.h
@@ -78,7 +78,8 @@ class CHROMEOS_EXPORT ShillDeviceClient {
   virtual void SetProperty(const dbus::ObjectPath& device_path,
                            const std::string& name,
                            const base::Value& value,
-                           const VoidDBusMethodCallback& callback) = 0;
+                           const base::Closure& callback,
+                           const ErrorCallback& error_callback) = 0;
 
   // Calls ClearProperty method.
   // |callback| is called after the method call finishes.
@@ -90,7 +91,7 @@ class CHROMEOS_EXPORT ShillDeviceClient {
   // |callback| is called after the method call finishes.
   virtual void AddIPConfig(const dbus::ObjectPath& device_path,
                            const std::string& method,
-                           const ObjectPathDBusMethodCallback& callback) = 0;
+                           const ObjectPathCallback& callback) = 0;
 
   // DEPRECATED DO NOT USE: Calls AddIPConfig method and blocks until the method
   // call finishes.