Add everything from src/tools/isolate r159537.

tests/isolate/symlink_partial.py

Index: tests/isolate/symlink_partial.py
diff --git a/tests/isolate/symlink_partial.py b/tests/isolate/symlink_partial.py
new file mode 100755
index 0000000000000000000000000000000000000000..d0437e5ab9502c6d1283ac493675585f37b70191
--- /dev/null
+++ b/tests/isolate/symlink_partial.py
@@ -0,0 +1,21 @@
+#!/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.
+
+import os
+import sys
+
+
+def main():
+  print 'symlink: touches files2/test_file2.txt'
+  assert len(sys.argv) == 1
+
+  if 'Bar\n' != open(os.path.join('files2', 'test_file2.txt'), 'rb').read():
+    print 'Failed'
+    return 1
+  return 0
+
+
+if __name__ == '__main__':
+  sys.exit(main())