WebUI: Update vulcanize.py to not process Downloads page anymore.

chrome/browser/resources/vulcanize.py

 #!/usr/bin/env python
 # Copyright 2016 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 subprocess
 import sys
 import tempfile
 
@@ skipping 91 matching lines @@
 
 
 def _css_build(directory, files):
   target_path = os.path.join(_HERE_PATH, directory)
   paths = map(lambda f: os.path.join(target_path, f), files)
 
   _run_node([node_modules.PathToPolymerCssBuild()] + paths)
 
 
 def main():
-  _vulcanize(directory='md_downloads', host='downloads',
-             html_in_file='downloads.html')
-  _css_build(directory='md_downloads', files=['vulcanized.html'])
-
   # Already loaded by history.html:
   history_extra_args = ['--exclude', 'chrome://resources/html/util.html',
                         '--exclude', 'chrome://history/constants.html']
   _vulcanize(directory='md_history', host='history', html_in_file='app.html',
              html_out_file='app.vulcanized.html', js_out_file='app.crisper.js',
              extra_args=history_extra_args)
 
   # Ensures that no file transitively imported by app.vulcanized.html is
   # imported by lazy_load.vulcanized.html.
   lazy_load_extra_args = ['--exclude', 'chrome://history/app.html']
   _vulcanize(directory='md_history', host='history',
              html_in_file='lazy_load.html',
              html_out_file='lazy_load.vulcanized.html',
              js_out_file='lazy_load.crisper.js',
              extra_args=history_extra_args + lazy_load_extra_args)
   _css_build(directory='md_history', files=['app.vulcanized.html',
                                             'lazy_load.vulcanized.html'])
 
 
 if __name__ == '__main__':
   main()