Generate subgroup StyleSurroundData in ComputedStyle.

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

Index: third_party/WebKit/Source/build/scripts/templates/fields/field.tmpl
diff --git a/third_party/WebKit/Source/build/scripts/templates/fields/field.tmpl b/third_party/WebKit/Source/build/scripts/templates/fields/field.tmpl
index d5e4a2b15078409d7a7d6c6840b0147b959283b5..9ded9eaa63683bd3fcf314347bd275ad3e251695 100644
--- a/third_party/WebKit/Source/build/scripts/templates/fields/field.tmpl
+++ b/third_party/WebKit/Source/build/scripts/templates/fields/field.tmpl
@@ -14,6 +14,22 @@ static_cast<{{field.type_name}}>({{value}})
 {%- endif %}
 {% endmacro %}
 
+{% macro getter_expression(field) %}
+{% if field.group_member_name -%}
+{{field.group_member_name}}->{{field.name}}
+{%- else -%}
+{{field.name}}
+{%- endif %}
+{% endmacro %}
+
+{% macro setter_expression(field) %}
+{% if field.group_member_name -%}
+{{field.group_member_name}}.Access()->{{field.name}}
+{%- else -%}
+{{field.name}}
+{%- endif %}
+{% endmacro %}
+
 {% macro nonconst_ref(field) %}
 {% if field.is_bit_field -%}
 {{field.type_name}}
@@ -29,3 +45,11 @@ static_cast<{{field.type_name}}>({{value}})
 const {{field.type_name}}&
 {%- endif %}
 {% endmacro %}
+
+{% macro declare_storage(field) %}
+{% if field.is_bit_field %}
+unsigned {{field.name}} : {{field.size}}; // {{field.type_name}}
+{%- else %}
+{{field.type_name}} {{field.name}};
+{%- endif %}
+{% endmacro %}