LibWeb: Remove ValueListStyleValue :^)

This was the whole point of this PR. No more dealing with
ComponentValues in StyleResolver!

Userland/Libraries/LibWeb/CSS/Parser/Parser.cpp

@@ -2839,7 +2839,8 @@ RefPtr<StyleValue> Parser::parse_css_value(PropertyID property_id, TokenStream<S
     if (component_values.size() == 1)
         return parse_css_value(m_context, property_id, component_values.first());
 
-    return ValueListStyleValue::create(move(component_values));
+    dbgln("Unable to parse value for CSS '{}' property.", string_from_property_id(property_id));
+    return {};
 }
 
 RefPtr<StyleValue> Parser::parse_css_value(ParsingContext const& context, PropertyID property_id, StyleComponentValueRule const& component_value)

Userland/Libraries/LibWeb/CSS/StyleResolver.cpp

@@ -542,11 +542,6 @@ static void set_property_expanding_shorthands(StyleProperties& style, CSS::Prope
         return;
     }
 
-    if (value.is_component_value_list()) {
-        dbgln("Values list for CSS property '{}' went unhandled. List: '{}'", string_from_property_id(property_id), value.to_string());
-        return;
-    }
-
     style.set_property(property_id, value);
 }
 

Userland/Libraries/LibWeb/CSS/StyleValue.cpp

@@ -172,23 +172,4 @@ void ImageStyleValue::resource_did_load()
         m_document->browsing_context()->set_needs_display({});
 }
 
-ValueListStyleValue::ValueListStyleValue(Vector<StyleComponentValueRule>&& values)
-    : StyleValue(Type::ComponentValueList)
-    , m_values(move(values))
-{
-}
-
-String ValueListStyleValue::to_string() const
-{
-    StringBuilder builder;
-    builder.appendff("List[{}](", m_values.size());
-    for (auto& value : m_values) {
-        builder.append(value.to_debug_string());
-        builder.append(",");
-    }
-
-    builder.append(")");
-    return builder.to_string();
-}
-
 }

Userland/Libraries/LibWeb/CSS/StyleValue.h

@@ -227,7 +227,6 @@ public:
         CustomProperty,
         Numeric,
         ValueList,
-        ComponentValueList,
         Calculated,
         Background,
         BackgroundRepeat,
@@ -254,7 +253,6 @@ public:
     bool is_custom_property() const { return type() == Type::CustomProperty; }
     bool is_numeric() const { return type() == Type::Numeric; }
     bool is_value_list() const { return type() == Type::ValueList; }
-    bool is_component_value_list() const { return type() == Type::ComponentValueList; }
     bool is_calculated() const { return type() == Type::Calculated; }
     bool is_background() const { return type() == Type::Background; }
     bool is_background_repeat() const { return type() == Type::BackgroundRepeat; }
@@ -1020,21 +1018,6 @@ private:
     NonnullRefPtrVector<StyleValue> m_values;
 };
 
-class ValueListStyleValue final : public StyleValue {
-public:
-    static NonnullRefPtr<ValueListStyleValue> create(Vector<StyleComponentValueRule>&& values) { return adopt_ref(*new ValueListStyleValue(move(values))); }
-    virtual ~ValueListStyleValue() override { }
-
-    virtual String to_string() const override;
-
-    Vector<StyleComponentValueRule> const& values() const { return m_values; }
-
-private:
-    ValueListStyleValue(Vector<StyleComponentValueRule>&&);
-
-    Vector<StyleComponentValueRule> m_values;
-};
-
 inline CSS::ValueID StyleValue::to_identifier() const
 {
     if (is_identifier())