[MD WebUI] Polymer-CSS-Build across all bundles.

chrome/browser/resources/polymer_css_build_gn.py

+#!/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 _css_build(out_folder, input_files, output_files):
+  out_path = os.path.join(_CWD, out_folder)
+  in_paths = map(lambda f: os.path.join(out_path, f), input_files)
+  out_paths = map(lambda f: os.path.join(out_path, f), output_files)
+
+  node.RunNode([node_modules.PathToPolymerCssBuild(), '-f'] + in_paths +
+               ['-o'] + out_paths)
+
+
+def main():
+  parser = argparse.ArgumentParser()
+  parser.add_argument('--out_folder')
+  parser.add_argument('--input_files', nargs='+')
+  parser.add_argument('--output_files', nargs='+')
+  args = parser.parse_args()
+
+  _css_build(
+      args.out_folder,
+      input_files=args.input_files,
+      output_files=args.output_files)
+
+
+if __name__ == '__main__':
+  main()