Generate CSSPropertyEquality instead of using hand-updated file.

third_party/WebKit/Source/core/core_generated.gyp

 #
 # Copyright (C) 2013 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
@@ skipping 371 matching lines @@
           ],
           'action': [
             'python',
             '../build/scripts/make_cssom_types.py',
             'css/CSSProperties.in',
             '--output_dir',
             '<(blink_core_output_dir)',
           ],
         },
         {
+          'action_name': 'CSSPropertyEquality',
+          'inputs': [
+            '<@(css_properties_files)',
+            '../build/scripts/make_css_property_equality.py',
+            '../build/scripts/templates/CSSPropertyEquality.cpp.tmpl',
+            '../build/scripts/templates/CSSPropertyEqualityCustom.h.tmpl',
+          ],
+          'outputs': [
+            '<(blink_core_output_dir)/CSSPropertyEquality.cpp',
+            '<(blink_core_output_dir)/CSSPropertyEqualityCustom.h',
+          ],
+          'action': [
+            'python',
+            '../build/scripts/make_css_property_equality.py',
+            'css/CSSProperties.in',
+            '--output_dir',
+            '<(blink_core_output_dir)',
+          ],
+        },
+        {
           'action_name': 'CSSPropertyMetadata',
           'inputs': [
             '<@(css_properties_files)',
             '../build/scripts/make_css_property_metadata.py',
             '../build/scripts/templates/CSSPropertyMetadata.cpp.tmpl',
           ],
           'outputs': [
             '<(blink_core_output_dir)/CSSPropertyMetadata.cpp',
           ],
           'action': [
@@ skipping 383 matching lines @@
             '../build/scripts/rule_bison.py',
             '<(RULE_INPUT_PATH)',
             '<(blink_core_output_dir)',
             '<(bison_exe)',
           ],
         },
       ],
     },
   ],
 }