Reduce size of generated extension FeatureProviders.

tools/json_schema_compiler/feature_compiler.py

 # 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 argparse
 import copy
 from datetime import datetime
 import os
 
 from code import Code
@@ skipping 480 matching lines @@
         for f in feature:
           c.Sblock('{')
           c.Concat(f.GetCode(self._feature_class))
           c.Append('features->push_back(std::move(feature));')
           c.Eblock('}')
         c.Append('std::unique_ptr<ComplexFeature> feature(')
         c.Append('    new ComplexFeature(std::move(features)));')
         c.Append('feature->set_name("%s");' % k)
       else:
         c.Concat(feature.GetCode(self._feature_class))
-      c.Append('features_["%s"] = std::move(feature);' % k)
+      c.Append('AddFeature("%s", std::move(feature));' % k)
       c.Eblock('}')
     c.Eblock('}')
     return c
 
   def Write(self):
     """Writes the output."""
     header_file_path = self._out_base_filename + '.h'
     cc_file_path = self._out_base_filename + '.cc'
     substitutions = ({
         'header_file_path': header_file_path,
@@ skipping 39 matching lines @@
       'out_base_filename', type=str,
       help='The base filename for the C++ files (.h and .cc will be appended)')
   parser.add_argument('source_files', type=str, nargs='+',
                       help='The source features.json files')
   args = parser.parse_args()
   c = FeatureCompiler(args.chrome_root, args.source_files, args.feature_class,
                       args.provider_class, args.out_root,
                       args.out_base_filename)
   c.Compile()
   c.Write()