dbus: Handle NameOwnerChanged in ObjectManager

dbus/object_manager.h

Index: dbus/object_manager.h
diff --git a/dbus/object_manager.h b/dbus/object_manager.h
index 333f69ec2f2cccfa26d3a0048b21c6e37ac3886f..0d3ae5d061684fdc97b36f0a6583bcde5ed8ad41 100644
--- a/dbus/object_manager.h
+++ b/dbus/object_manager.h
@@ -273,6 +273,12 @@ public:
   void RemoveInterface(const ObjectPath& object_path,
                        const std::string& interface_name);
 
+  // Removes all objects and interfaces from the object manager when
+  // |old_owner| is not the empty string and/or re-requests the set of managed
+  // objects when |new_owner| is not the empty string.
+  void NameOwnerChanged(const std::string& old_owner,
+                        const std::string& new_owner);
+
   Bus* bus_;
   std::string service_name_;
   ObjectPath object_path_;