diff -r 000000000000 -r 6474c204b198 ipc/chromium/src/base/lock.cc
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ipc/chromium/src/base/lock.cc	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,7 @@
+// Copyright (c) 2006-2008 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.
+
+// Lock class.
+
+// Depricated file.  See lock_impl_*.cc for platform specific versions.