Add a fast-path for independent inherited properties

third_party/WebKit/Source/build/scripts/templates/StyleBuilderFunctions.cpp.tmpl

 {% from 'macros.tmpl' import license %}
 {#
     This file is for property handlers which use the templating engine to
     reduce (handwritten) code duplication.
 
     The `properties' dict can be used to access a property's parameters in
     jinja2 templates (i.e. setter, getter, initial, type_name)
 #}
 #include "StyleBuilderFunctions.h"
 
@@ skipping 25 matching lines @@
 state.style()->{{property.setter}}
 {%- endif %}
 {% endmacro %}
 {% macro convert_and_set_value(property) %}
 {% if property.converter %}
 {{set_value(property)}}(StyleBuilderConverter::{{property.converter}}(state, value));
 {%- else %}
 {{set_value(property)}}(toCSSPrimitiveValue(value).convertTo<{{property.type_name}}>());
 {%- endif %}
 {% endmacro %}
+{% macro set_is_inherited(property) %}
+state.style()->{{property.is_inherited_setter}}
+{% endmacro %}
 
 namespace blink {
 
 {% for property_id, property in properties.items() if property.should_declare_functions %}
 {% set apply_type = property.apply_type %}
 {% if not property.custom_initial %}
 {{declare_initial_function(property_id)}}
 {
     {% if property.svg %}
     {{set_value(property)}}(SVGComputedStyle::{{property.initial}}());
     {% elif property.font %}
     {{set_value(property)}}(FontBuilder::{{property.initial}}());
     {% else %}
     {{set_value(property)}}(ComputedStyle::{{property.initial}}());
     {% endif %}
+    {% if property.independent %}
+    {{set_is_inherited(property)}}(true);
+    {% endif %}
 }
 
 {% endif %}
 {% if not property.custom_inherit %}
 {{declare_inherit_function(property_id)}}
 {
     {% if property.svg %}
     {{set_value(property)}}(state.parentStyle()->svgStyle().{{property.getter}}());
     {% elif property.font %}
     {{set_value(property)}}(state.parentFontDescription().{{property.getter}}());
     {% else %}
     {{set_value(property)}}(state.parentStyle()->{{property.getter}}());
     {% endif %}
+    {% if property.independent %}
+    {{set_is_inherited(property)}}(false);
+    {% endif %}
 }
 
 {% endif %}
 {% if not property.custom_value %}
 {{declare_value_function(property_id)}}
 {
     {{convert_and_set_value(property)}}
+    {% if property.independent %}
+    {{set_is_inherited(property)}}(false);
+    {% endif %}
 }
 
 {% endif %}
 {% endfor %}
 
 {% macro apply_animation(property_id, attribute, animation) %}
 {% set vector = attribute|lower_first + "List()" %}
 {{declare_initial_function(property_id)}}
 {
     CSS{{animation}}Data& data = state.style()->access{{animation}}s();
@@ skipping 442 matching lines @@
         paintType = url.isEmpty() ? SVG_PAINTTYPE_RGBCOLOR : SVG_PAINTTYPE_URI_RGBCOLOR;
     }
     {{set_value(property)}}(paintType, color, url,
         state.applyPropertyToRegularStyle(),
         state.applyPropertyToVisitedLinkStyle());
 }
 {% endmacro %}
 {{apply_svg_paint('CSSPropertyFill', 'FillPaint')}}
 {{apply_svg_paint('CSSPropertyStroke', 'StrokePaint')}}
 } // namespace blink