CSSValue Immediates: Replace CSSValue usage with const references

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 "config.h"
 #include "StyleBuilderFunctions.h"
 
 #include "CSSValueKeywords.h"
 #include "core/css/BasicShapeFunctions.h"
 #include "core/css/CSSContentDistributionValue.h"
 #include "core/css/CSSPrimitiveValueMappings.h"
 #include "core/css/Pair.h"
 #include "core/css/resolver/StyleResolverState.h"
 
 {% macro declare_initial_function(property_id) %}
 void StyleBuilderFunctions::applyInitial{{property_id}}(StyleResolverState& state)
 {%- endmacro %}
 {% macro declare_inherit_function(property_id) %}
 void StyleBuilderFunctions::applyInherit{{property_id}}(StyleResolverState& state)
 {%- endmacro %}
 {% macro declare_value_function(property_id) %}
-void StyleBuilderFunctions::applyValue{{property_id}}(StyleResolverState& state, CSSValue value)
+void StyleBuilderFunctions::applyValue{{property_id}}(StyleResolverState& state, const CSSValue& value)
 {%- endmacro %}
 {% macro set_value(property) %}
 {% if property.svg %}
 state.style()->accessSVGStyle().{{property.setter}}
 {%- elif property.font %}
 state.fontBuilder().{{property.setter}}
 {%- else %}
 state.style()->{{property.setter}}
 {%- endif %}
 {% endmacro %}
@@ skipping 469 matching lines @@
         svgParentStyle.{{paint_type|lower_first}}Type(),
         svgParentStyle.{{paint_type|lower_first}}Color(),
         svgParentStyle.{{paint_type|lower_first}}Uri(),
         state.applyPropertyToRegularStyle(),
         state.applyPropertyToVisitedLinkStyle());
 }
 
 {{declare_value_function(property_id)}}
 {
     String url;
-    if (value.isValueList()) {
-        CSSValueList& list = toCSSValueList(value);
+    CSSValue valueToUse = value;
+    if (valueToUse.isValueList()) {
+        CSSValueList& list = toCSSValueList(valueToUse);
         ASSERT(list.length() > 1);
 
         if (!list.item(0).isPrimitiveValue())
             return;
 
         CSSPrimitiveValue& primitiveValue = toCSSPrimitiveValue(list.item(0));
         if (!primitiveValue.isURI())
             return;
 
         url = primitiveValue.getStringValue();
-        value = list.item(1);
+        valueToUse = list.item(1);
     }
-    if (value.isPrimitiveValue()) {
-        CSSPrimitiveValue& primitiveValue = toCSSPrimitiveValue(value);
+    if (valueToUse.isPrimitiveValue()) {
+        CSSPrimitiveValue& primitiveValue = toCSSPrimitiveValue(valueToUse);
         Color color;
         SVGPaintType paintType = SVG_PAINTTYPE_RGBCOLOR;
         if (primitiveValue.getValueID() == CSSValueNone) {
             paintType = url.isEmpty() ? SVG_PAINTTYPE_NONE : SVG_PAINTTYPE_URI_NONE;
         } else if (primitiveValue.isURI()) {
             paintType = SVG_PAINTTYPE_URI;
             url = primitiveValue.getStringValue();
         } else if (primitiveValue.getValueID() == CSSValueCurrentcolor) {
             color = state.style()->color();
             paintType = url.isEmpty() ? SVG_PAINTTYPE_CURRENTCOLOR : SVG_PAINTTYPE_URI_CURRENTCOLOR;
         } else {
-            color = StyleBuilderConverter::convertColor(state, value);
+            color = StyleBuilderConverter::convertColor(state, valueToUse);
             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