Create metric_tool to deal with metric definitions

infra/tools/metric_tool/test/data/metric_name_not_a_string.py

Index: infra/tools/metric_tool/test/data/metric_name_not_a_string.py
diff --git a/infra/tools/metric_tool/test/data/metric_name_not_a_string.py b/infra/tools/metric_tool/test/data/metric_name_not_a_string.py
new file mode 100644
index 0000000000000000000000000000000000000000..933c579d18ac9d64a48f9f768832244647b5099b
--- /dev/null
+++ b/infra/tools/metric_tool/test/data/metric_name_not_a_string.py
@@ -0,0 +1,12 @@
+# Copyright 2015 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.
+
+"""Example containing metrics whose name is set using a variable
+
+Don't do that, it's just to make sure the parsing is robust.
+"""
+from infra_libs import ts_mon
+
+metric_name = '/my/metric1'
+ts_mon.BooleanMetric(metric_name, description='metric1')