Sort fields in ComputedStyleBase in decreasing order of size

third_party/WebKit/Source/build/scripts/make_computed_style_base.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 math
 import sys
 
 import in_generator
 import template_expander
@@ skipping 120 matching lines @@
                     type=type_name,
                     size=int(math.ceil(bits_needed)),
                     default_value=default_value,
                     getter_method_name=property_name_lower,
                     setter_method_name='set' + property_name,
                     initial_method_name='initial' + property_name,
                     resetter_method_name='reset' + property_name,
                     is_inherited_method_name=property_name_lower + 'IsInherited',
                 ))
 
+        # Small optimization: order fields by size, from largest to smallest,
+        # to reduce wasted space from alignment.
+        self._fields.sort(key=lambda f: f.size, reverse=True)
+
     @template_expander.use_jinja('ComputedStyleBase.h.tmpl')
     def generate_base_computed_style_h(self):
         return {
             'properties': self._properties,
             'enums': self._computed_enums,
             'fields': self._fields,
         }
 
     @template_expander.use_jinja('ComputedStyleBase.cpp.tmpl')
     def generate_base_computed_style_cpp(self):
         return {
             'properties': self._properties,
             'enums': self._computed_enums,
             'fields': self._fields,
         }
 
     @template_expander.use_jinja('ComputedStyleBaseConstants.h.tmpl')
     def generate_base_computed_style_constants(self):
         return {
             'properties': self._properties,
             'enums': self._computed_enums,
             'fields': self._fields,
         }
 
 if __name__ == '__main__':
     in_generator.Maker(ComputedStyleBaseWriter).main(sys.argv)