[selectors4] Implement :focus-within pseudo-class

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 json5_generator
 import template_expander
@@ skipping 20 matching lines @@
      ]},
     {'name': 'InsideLink', 'field_template': 'keyword', 'default_value': 'not-inside-link',
      'keywords': ['not-inside-link', 'inside-unvisited-link', 'inside-visited-link'],
      'inherited': True, 'independent': False},
     # Style can not be shared.
     {'name': 'Unique', 'field_template': 'monotonic_flag',
      'inherited': False, 'independent': False, 'default_value': False},
     # Whether this style is affected by these pseudo-classes.
     {'name': 'AffectedByFocus', 'field_template': 'monotonic_flag',
      'inherited': False, 'independent': False, 'default_value': False},
+    {'name': 'AffectedByFocusWithin', 'field_template': 'monotonic_flag',
+     'inherited': False, 'independent': False, 'default_value': False},
     {'name': 'AffectedByHover', 'field_template': 'monotonic_flag',
      'inherited': False, 'independent': False, 'default_value': False},
     {'name': 'AffectedByActive', 'field_template': 'monotonic_flag',
      'inherited': False, 'independent': False, 'default_value': False},
     {'name': 'AffectedByDrag', 'field_template': 'monotonic_flag',
      'inherited': False, 'independent': False, 'default_value': False},
     # A non-inherited property references a variable or @apply is used
     {'name': 'HasVariableReferenceFromNonInheritedProperty', 'field_template': 'monotonic_flag',
      'inherited': False, 'independent': False, 'default_value': False},
     # Explicitly inherits a non-inherited property
@@ skipping 353 matching lines @@
                     'mapping': [(enum_value_name(k), enum_for_css_keyword(k)) for k in property_['keywords']],
                 }
 
         return {
             'include_paths': self._include_paths,
             'mappings': mappings,
         }
 
 if __name__ == '__main__':
     json5_generator.Maker(ComputedStyleBaseWriter).main()