Add everything from src/tools/isolate r159537.

tests/isolate/symlink_full.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
+
+
+def main():
+  print 'symlink: touches files2/'
+  assert len(sys.argv) == 1
+
+  expected = {
+    os.path.join('subdir', '42.txt'):
+        'the answer to life the universe and everything\n',
+    'test_file1.txt': 'Foo\n',
+    'test_file2.txt': 'Bar\n',
+  }
+
+  root = 'files2'
+  actual = {}
+  for relroot, dirnames, filenames in os.walk(root):
+    for filename in filenames:
+      fullpath = os.path.join(relroot, filename)
+      actual[fullpath[len(root)+1:]] = open(fullpath, 'rb').read()
+    if '.svn' in dirnames:
+      dirnames.remove('.svn')
+
+  if actual != expected:
+    print 'Failure'
+    print actual
+    print expected
+    return 1
+  return 0
+
+
+if __name__ == '__main__':
+  sys.exit(main())