DO NOT SUBMIT, Uglify print preview resources, WIP.

chrome/browser/resources/uglify_gn.py

Index: chrome/browser/resources/uglify_gn.py
diff --git a/chrome/browser/resources/uglify_gn.py b/chrome/browser/resources/uglify_gn.py
new file mode 100755
index 0000000000000000000000000000000000000000..92636de658760196505e9e6c4beebc2e0de46cf8
--- /dev/null
+++ b/chrome/browser/resources/uglify_gn.py
@@ -0,0 +1,45 @@
+#!/usr/bin/env python
+# Copyright 2017 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 argparse
+import os
+import sys
+
+_HERE_PATH = os.path.dirname(__file__)
+_SRC_PATH = os.path.normpath(os.path.join(_HERE_PATH, '..', '..', '..'))
+_CWD = os.getcwd()
+
+sys.path.append(os.path.join(_SRC_PATH, 'third_party', 'node'))
+import node
+import node_modules
+
+def _uglify(base_folder, out_folder, input_files, output_file):
+  out_path = os.path.join(_CWD, out_folder)
+  in_file_paths = map(lambda f: os.path.join(base_folder, f), input_files)
+  out_file_path = os.path.join(out_path, output_file)
+
+  args = in_file_paths + [
+      '--comments', '"/Copyright|license|LICENSE|\<\/?if/"',
+      '--output', out_file_path]
+  node.RunNode([node_modules.PathToUglify()] + args)
+
+
+def main():
+  parser = argparse.ArgumentParser()
+  parser.add_argument('--base_folder', required=True)
+  parser.add_argument('--out_folder', required=True)
+  parser.add_argument('--input_files', nargs='+')
+  parser.add_argument('--output_file', required=True)
+  args = parser.parse_args()
+
+  _uglify(
+      args.base_folder,
+      args.out_folder,
+      input_files=args.input_files,
+      output_file=args.output_file)
+
+
+if __name__ == '__main__':
+  main()