Add everything from src/tools/isolate r159537.

tests/run_test_cases/sleep.py

Index: tests/run_test_cases/sleep.py
diff --git a/tests/run_test_cases/sleep.py b/tests/run_test_cases/sleep.py
new file mode 100755
index 0000000000000000000000000000000000000000..552f973b77804549e2667f1c095e7c49faf0347d
--- /dev/null
+++ b/tests/run_test_cases/sleep.py
@@ -0,0 +1,22 @@
+#!/usr/bin/env python
+# 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.
+
+"""Sleeps."""
+
+import sys
+import time
+
+
+def main():
+  assert len(sys.argv) == 2
+  print 'Sleeping.'
+  sys.stdout.flush()
+  time.sleep(float(sys.argv[1]))
+  print 'Slept.'
+  return 0
+
+
+if __name__ == '__main__':
+  sys.exit(main())