MD Downloads: strip combined, minified JS from vulcanized output

chrome/browser/resources/md_downloads/vulcanize.py

 #!/usr/bin/env python
 # Copyright 2015 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
 
 
 _HERE_PATH = os.path.join(os.path.dirname(__file__))
 
 _HTML_IN_PATH = os.path.join(_HERE_PATH, 'downloads.html')
 _HTML_OUT_PATH = os.path.join(_HERE_PATH, 'vulcanized.html')
 _JS_OUT_PATH = os.path.join(_HERE_PATH, 'crisper.js')
 
 _SRC_PATH = os.path.normpath(os.path.join(_HERE_PATH, '..', '..', '..', '..'))
 
 _RESOURCES_PATH = os.path.join(_SRC_PATH, 'ui', 'webui', 'resources')
 
 _CR_ELEMENTS_PATH = os.path.join(_RESOURCES_PATH, 'cr_elements')
 _CSS_RESOURCES_PATH = os.path.join(_RESOURCES_PATH, 'css')
 _HTML_RESOURCES_PATH = os.path.join(_RESOURCES_PATH, 'html')
 _JS_RESOURCES_PATH = os.path.join(_RESOURCES_PATH, 'js')
 
 _POLYMER_PATH = os.path.join(
     _SRC_PATH, 'third_party', 'polymer', 'v1_0', 'components-chromium')
-_WEB_ANIMATIONS_PATH = os.path.join(
-    _SRC_PATH, 'third_party', 'web-animations-js', 'sources')
 
 _VULCANIZE_ARGS = [
   '--exclude', 'crisper.js',
+
+  # These files are already combined and minified.
+  '--exclude', 'polymer-extracted.js',
+  '--exclude', 'polymer-micro-extracted.js',
+  '--exclude', 'polymer-mini-extracted.js',
+  '--exclude', 'polymer_config.js',
+  '--exclude', 'web-animations-next-lite.min.js',
+
+  # These files are dynamically created by C++.
   '--exclude', 'load_time_data.js',
   '--exclude', 'strings.js',
   '--exclude', 'text_defaults.css',
+
   '--inline-css',
   '--inline-scripts',
+
   '--redirect', 'chrome://downloads/|%s' % _HERE_PATH,
   '--redirect', 'chrome://resources/cr_elements/|%s' % _CR_ELEMENTS_PATH,
   '--redirect', 'chrome://resources/css/|%s' % _CSS_RESOURCES_PATH,
   '--redirect', 'chrome://resources/html/|%s' % _HTML_RESOURCES_PATH,
   '--redirect', 'chrome://resources/js/|%s' % _JS_RESOURCES_PATH,
-  '--redirect', 'chrome://resources/polymer/v1_0/web-animations-js/|%s' % _WEB_ANIMATIONS_PATH,
   '--redirect', 'chrome://resources/polymer/v1_0/|%s' % _POLYMER_PATH,
+
   '--strip-comments',
 ]
 
 def main():
   def _run_cmd(cmd_parts, stdout=None):
     cmd = "'" + "' '".join(cmd_parts) + "'"
     process = subprocess.Popen(
         cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
     stdout, stderr = process.communicate()
 
@@ skipping 13 matching lines @@
     _run_cmd(['crisper', '--source', tmp.name,
                          '--script-in-head', 'false',
                          '--html', _HTML_OUT_PATH,
                          '--js', _JS_OUT_PATH])
   finally:
     os.remove(tmp.name)
 
 
 if __name__ == '__main__':
   main()