Generate StyleRareNonInheritedData in ComputedStyleBase.

third_party/WebKit/Source/build/scripts/templates/fields/group.tmpl

 {% from 'fields/field.tmpl' import encode, declare_storage, compare %}
 {% from 'macros.tmpl' import print_if %}
 {% macro declare_field_group_class(group): -%}
 class {{group.type_name}} : public RefCounted<{{group.type_name}}> {
  public:
   static PassRefPtr<{{group.type_name}}> Create() {
     return AdoptRef(new {{group.type_name}});
   }
   PassRefPtr<{{group.type_name}}> Copy() const {
     return AdoptRef(new {{group.type_name}}(*this));
   }
 
   bool operator==(const {{group.type_name}}& other) const {
     return (
-    {% for field in group.fields %}
+    {% for field in group.fields if not field.custom_compare %}
       {{compare(field.wrapper_pointer_name, field.name, "other")}}{{print_if(not loop.last, ' &&')}}
     {% endfor %}
     );
   }
   bool operator!=(const {{group.type_name}}& other) const { return !(*this == other); }
 
   {% for field in group.fields %}
   {{declare_storage(field)}}
   {% endfor %}
 
@@ skipping 13 matching lines @@
 ComputedStyleBase::{{group.type_name}}::{{group.type_name}}(const {{group.type_name}}& other) :
   {% for field in group.fields %}
     {% if field.wrapper_pointer_name %}
       {{field.name}}(MemberCopy(other.{{field.name}})){{print_if(not loop.last, ',')}}
     {% else %}
       {{field.name}}(other.{{field.name}}){{print_if(not loop.last, ',')}}
      {% endif %}
   {% endfor %}
   {}
 {%- endmacro %}