dbus: add ObjectPath type

dbus/object_path.cc

Index: dbus/object_path.cc
diff --git a/dbus/object_path.cc b/dbus/object_path.cc
new file mode 100644
index 0000000000000000000000000000000000000000..e0ee783e4038d73062f4372cc85dbca13e68cf0b
--- /dev/null
+++ b/dbus/object_path.cc
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "dbus/object_path.h"
+
+#include <ostream>
+#include <string>
+
+namespace dbus {
+
+bool operator<(const ObjectPath& lhs, const ObjectPath& rhs) {
+  return lhs.value() < rhs.value();
+}
+
+bool operator==(const ObjectPath& lhs, const ObjectPath& rhs) {
+  return lhs.value() == rhs.value();
+}
+
+bool operator!=(const ObjectPath& lhs, const ObjectPath& rhs) {
+  return lhs.value() != rhs.value();
+}
+
+std::ostream& operator<<(std::ostream& os, const ObjectPath& object_path) {
+  os << object_path.value();
+  return os;
+}
+
+} // namespace dbus