Swarming bots: Add support for perf steps

infra/bots/add_isolated_input.py

Index: infra/bots/add_isolated_input.py
diff --git a/infra/bots/add_isolated_input.py b/infra/bots/add_isolated_input.py
new file mode 100644
index 0000000000000000000000000000000000000000..70bde6d7acf5087487de0b00d976eb7b72d8fb23
--- /dev/null
+++ b/infra/bots/add_isolated_input.py
@@ -0,0 +1,33 @@
+#!/usr/bin/env python
+#
+# Copyright 2016 Google Inc.
+#
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+
+import argparse
+import json
+
+
+"""Add the given hash to the includes section of the given isolated file."""
+
+
+def add_isolated_hash(isolated_file, hash_str):
+  with open(isolated_file) as f:
+    isolated = json.load(f)
+  isolated['includes'].append(hash_str)
+  with open(isolated_file, 'w') as f:
+    json.dump(isolated, f, sort_keys=True)
+
+
+def main():
+  parser = argparse.ArgumentParser()
+  parser.add_argument('--isolated_file', required=True)
+  parser.add_argument('--hash', required=True)
+  args = parser.parse_args()
+  add_isolated_hash(args.isolated_file, args.hash)
+
+
+if __name__ == '__main__':
+  main()