Add everything from src/tools/isolate r159537.

tests/trace_inputs/child2.py

+#!/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
+import time
+
+
+def main():
+  print 'child2'
+  # Introduce a race condition with the parent so the parent may have a chance
+  # to exit before the child. Will be random.
+  time.sleep(.01)
+
+  if sys.platform in ('darwin', 'win32'):
+    # Check for case-insensitive file system. This happens on Windows and OSX.
+    open('Test_File.txt', 'rb').close()
+  else:
+    open('test_file.txt', 'rb').close()
+
+  expected = {
+    'bar': 'Foo\n',
+    'foo': 'Bar\n',
+  }
+
+  root = 'files1'
+  actual = dict(
+      (filename, open(os.path.join(root, filename), 'rb').read())
+      for filename in (os.listdir(root))
+      if (filename != 'do_not_care.txt' and
+          os.path.isfile(os.path.join(root, filename))))
+
+  if actual != expected:
+    print 'Failure'
+    print actual
+    print expected
+    return 1
+  return 0
+
+
+if __name__ == '__main__':
+  sys.exit(main())