diff --git a/contrib/refactor-libchrome/disallow-copy-and-assign.py b/contrib/refactor-libchrome/disallow-copy-and-assign.py
new file mode 100755
index 0000000..6db880b
--- /dev/null
+++ b/contrib/refactor-libchrome/disallow-copy-and-assign.py
@@ -0,0 +1,73 @@
+#!/usr/bin/env python
+# Copyright 2020 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""
+Usage: ag DISALLOW_COPY_AND_ASSIGN -l | xargs -n 1 python[23] ./disallow-copy-and-assign.py
+
+Please note, this script doesn't guanrantee all usages are correctly replaced.
+Result must be checked by humans.
+Known issues:
+  1. It may put in the middle of inlined complex constructor function body.
+  2. It may failed to locate constructor and put the line after public: if
+  constructor is complex (especially member initialization).
+  3. It may failed to locate public: and not altering the file.
+  4. It may put the code into protected or private if the original code has a
+  protected or private constructor.
+
+This script doesn't format code, please run:
+  src/repohooks/clang-format.py --fix . --working
+to format code with clang-foramt.
+
+Also the script doesn't delete empty lines or empty priavte: section.
+Scripts like:
+  git diff-tree -r HEAD | awk '{print $6;}' | xargs  perl -0 -i -pe 's/ *private:\n*}/}/g'
+  git diff-tree -r HEAD | awk '{print $6;}' | xargs  perl -0 -i -pe 's/\n\n};/\n};/g'
+are recommend AFTER git commit is made (and you can amend commit later).
+
+You can use the following validity check script to help locate known issue (1):
+  git diff m/master | egrep -o '^[+-]   +([A-Za-z0-9]+\(|DISALLOW_COPY_AND_ASSIGN).*'
+The script helps you quickly filter only diffs that are not with exact 2-space
+indent. And you can look at if the result is in pairs.
+"""
+
+import re
+import sys
+
+
+def main():
+    content = open(sys.argv[1], 'r').read()
+
+    while True:
+        found = re.search(r'^ *DISALLOW_COPY_AND_ASSIGN\(([^)]*)\);', content,
+                          re.MULTILINE)
+        if not found:
+            break
+        classname = found.group(1)
+        found_constructors = list(
+            re.compile(
+                '^ *(explicit )?' + classname + '\(([^;{]*;|[^;{]*{[^}]*})$',
+                re.MULTILINE).finditer(content, 0, found.start()))
+        if found_constructors:
+            # Pick the last constructor.
+            insertion_point = found_constructors[-1].end()
+        else:
+            # If no constructors are found, look for public:.
+            insertion_point = list(
+                re.compile('class ' + classname + r' .*{[ \n]*public:\n',
+                           re.MULTILINE).finditer(content, 0,
+                                                  found.start()))[-1].end()
+        content = ('%(prefix)s' + '%(name)s(const %(name)s&) = delete;\n' +
+                   '%(name)s& operator=(const %(name)s&) = delete;\n'
+                   '%(middle)s%(suffix)s') % {
+                       'prefix': content[0:insertion_point + 1],
+                       'name': classname,
+                       'middle': content[insertion_point:found.start()],
+                       'suffix': content[found.end() + 1:],
+                   }
+    open(sys.argv[1], 'w').write(content)
+
+
+if __name__ == '__main__':
+    main()