Remove spurious check for invalid value.

The isCSSPrimitiveValue check is likely covering up parser bugs,
and toCSSPrimitiveValue has the assert to ensure we're not
doing something bad.

R=eae,ksakamoto@chromium.org,timloh@chromium.org
BUG=

Review URL: https://codereview.chromium.org/184103034

git-svn-id: svn://svn.chromium.org/blink/trunk@168577 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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

@@ -59,8 +59,6 @@ void StyleBuilderFunctions::applyValue{{property_id}}(StyleResolverState& state,
 {%- 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)));