Extensions Docs Server: Generalize $ref's to work for any schema node

chrome/common/extensions/docs/server2/intro_data_source.py

 # Copyright (c) 2012 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.
 
 from HTMLParser import HTMLParser
 import re
 import logging
 
 from docs_server_utils import FormatKey
 from file_system import FileNotFoundError
 import compiled_file_system as compiled_fs
 from third_party.handlebar import Handlebar
 
 # Increment this version if there are changes to the table of contents dict that
 # IntroDataSource caches.
-_VERSION = 1
+_VERSION = 2
 
 _H1_REGEX = re.compile('<h1[^>.]*?>.*?</h1>', flags=re.DOTALL)
 
 class _IntroParser(HTMLParser):
   """ An HTML parser which will parse table of contents and page title info out
   of an intro.
   """
   def __init__(self):
     HTMLParser.__init__(self)
     self.toc = []
@@ skipping 64 matching lines @@
         'extensions_toc': extensions_parser.toc,
       }
 
     def Create(self):
       return IntroDataSource(self._cache, self._base_paths)
 
   def __init__(self, cache, base_paths):
     self._cache = cache
     self._base_paths = base_paths
 
-  def __getitem__(self, key):
-    return self.get(key)
-
   def get(self, key):
     real_path = FormatKey(key)
     error = None
     for base_path in self._base_paths:
       try:
         return self._cache.GetFromFile(base_path + '/' + real_path)
       except FileNotFoundError as error:
         pass
     raise ValueError(str(error) + ': No intro found for "%s".' % key)