Revert 168577 "Remove spurious check for invalid value."

trunk/Source/build/scripts/templates/StyleBuilder.cpp.tmpl

 {% from "macros.tmpl" import wrap_with_condition, license -%}
 {{ license() }}
 
 #include "config.h"
 #include "core/css/resolver/StyleBuilder.h"
 
 #include "StyleBuilderFunctions.h"
 #include "core/css/CSSPrimitiveValueMappings.h"
 #include "core/css/resolver/StyleResolverState.h"
 
@@ skipping 41 matching lines @@
 {%- endif %}
 }
 {% endif %}
 
 {%- if not property.custom_value %}
 void StyleBuilderFunctions::applyValue{{property_id}}(StyleResolverState& state, CSSValue* value)
 {
 {%- if property.converter %}
     {{ set_value(property) }}(StyleBuilderConverter::{{property.converter}}(state, value));
 {%- elif property.font %}
+    if (!value->isPrimitiveValue())
+        return;
     {{ set_value(property) }}(static_cast<{{property.type_name}}>(*toCSSPrimitiveValue(value)));
 {%- else %}
     {{ set_value(property) }}(static_cast<{{property.type_name}}>(*toCSSPrimitiveValue(value)));
 {%- endif %}
 }
 {% endif %}
 
 {%- endcall %}
 {%- endfor %}
 
@@ skipping 12 matching lines @@
             StyleBuilderFunctions::applyValue{{ used_property_id }}(state, value);
         return true;
 {%- endcall %}
 {% endfor %}
     default:
         return false;
     }
 }
 
 } // namespace WebCore