Create metric_tool to deal with metric definitions

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

Index: infra/tools/metric_tool/test/data/other_tests.py
diff --git a/infra/tools/metric_tool/test/data/other_tests.py b/infra/tools/metric_tool/test/data/other_tests.py
new file mode 100644
index 0000000000000000000000000000000000000000..7e91fb9e5e24f803beae0734749f6ad61f2d4f33
--- /dev/null
+++ b/infra/tools/metric_tool/test/data/other_tests.py
@@ -0,0 +1,18 @@
+# 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.
+
+"""This file is meant to exercise weird cases in metric_tool.py"""
+
+import infra_libs
+
+def nice_function():
+  # Calling of function as an attribute which is not a *Metric()
+  infra_libs.read_json_as_utf8()
+
+  # Wrong type passed to 'description'
+  infra_libs.ts_mon.BooleanMetric('/my/metric', description=1)
+
+def other_function():
+  # Function call that is not a metric instantiation.
+  nice_function()