[cronet] Make getAcceptLanguages index a static table instead of the application bundle.

components/cronet/tools/generate_accept_languages.py

+# 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.
+
+# This script generates a header containing a dictionary from locales to
+# accept language strings from chromium's .xtb files.  It is not very
+# robust at the moment, and makes some assumptions about the format of
+# the files, including at least the following:
+#   * assumes necessary data is contained only with files of the form
+#     components/strings/components_locale_settings_${LANG}.xtb
+#   * assumes ${LANG} is identified in the lang attribute of the root
+#     element of the file's xml data
+#   * assumes that there is only one relevant element with the
+#     IDS_ACCEPT_LANGUAGES attribute
+
+import os, re, sys
+from xml.etree import ElementTree
+
+STRINGS_DIR = sys.argv[2] + 'components/strings/'
+
+def extract_accept_langs(filename):
+  tree = ElementTree.parse(STRINGS_DIR + filename).getroot()
+  for child in tree:
+    if child.get('id') == 'IDS_ACCEPT_LANGUAGES':
+      return tree.get('lang'), child.text
+
+def gen_accept_langs_table():
+  return dict(filter(None, (extract_accept_langs(filename)
+    for filename in os.listdir(STRINGS_DIR)
+    if re.match(r'components_locale_settings_\S+.xtb', filename))))
+
+HEADER = "NSDictionary* acceptLangs = @{"
+def LINE(locale, accept_langs):
+  return '  @"' + locale + '" : @"' + accept_langs + '",'
+FOOTER = "};"
+
+def main():
+  with open(sys.argv[1] + "/accept_languages_table.h", "w+") as f:
+    print >>f, HEADER
+    for (locale, accept_langs) in gen_accept_langs_table().items():
+      print >>f, LINE(locale, accept_langs)
+    print >>f, FOOTER
+
+if __name__ == "__main__":
+  main()