Explicitly CHECK arguments in dbus::MessageWriter::AppendString/ObjectPath

dbus/string_util.h

Index: dbus/string_util.h
diff --git a/dbus/string_util.h b/dbus/string_util.h
new file mode 100644
index 0000000000000000000000000000000000000000..b83467e367bae4530ecb64d6d81fb3788a08caea
--- /dev/null
+++ b/dbus/string_util.h
@@ -0,0 +1,18 @@
+// 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.
+
+#ifndef DBUS_STRING_UTIL_H_
+#define DBUS_STRING_UTIL_H_
+#pragma once
+
+#include <string>
+
+namespace dbus {
+
+// Returns true if the specified string is a valid object path.
+bool IsValidObjectPath(const std::string& value);
+
+}  // namespace dbus
+
+#endif  // DBUS_STRING_UTIL_H_