Added property id comments to CSSDescriptorIndices entries.

third_party/WebKit/Source/build/scripts/make_css_property_apis.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 sys
 
 import json5_generator
 import template_expander
 import make_style_builder
@@ skipping 76 matching lines @@
                 index=i + 1,
                 classname=classname,
                 property_ids=properties_for_class[classname],
                 methods_for_class=self.methods_for_classes[classname]
             ))
 
         # Build a table converting id (including aliases) to api class descriptors
         self._invalid_descriptor_index = 0
         # Initialize the whole thing to the invalid descriptor to handle gaps
         num_indices = self.last_unresolved_property_id + 1
-        self._descriptor_indices = [self._invalid_descriptor_index] * num_indices
+        self._descriptor_indices = dict.fromkeys(xrange(num_indices), {'id': self._invalid_descriptor_index, 'api': None})
         # Now populate all entries for which there exists a class, i.e. that aren't gaps
         for api_class in self._api_classes:
             for property_enum in property_enums_for_class[api_class.classname]:
-                self._descriptor_indices[property_enum] = api_class.index
+                self._descriptor_indices[property_enum] = {'id': api_class.index, 'api': api_class.classname}
 
     @template_expander.use_jinja('CSSPropertyDescriptor.cpp.tmpl')
     def generate_property_descriptor_cpp(self):
         return {
             'api_classes': self._api_classes,
             'ordered_api_method_names': self.ordered_api_method_names,
             'descriptor_indices': self._descriptor_indices,
             'invalid_descriptor_index': self._invalid_descriptor_index
         }
 
@@ skipping 17 matching lines @@
         def generate_property_api_h():
             return {
                 'api_classname': api_classname,
                 'methods_for_class': self.methods_for_classes[api_classname],
                 'all_api_methods': self.all_api_methods,
             }
         return generate_property_api_h
 
 if __name__ == '__main__':
     json5_generator.Maker(CSSPropertyAPIWriter).main()