LibWeb: Allow setting initial value context when creating CSS parser

Author: https://github.com/Calme1709
Commit: fbc6a4c96f
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/6426
Reviewed-by: https://github.com/AtkinsSJ ✅

Libraries/LibWeb/CSS/Parser/Parser.cpp

@@ -67,6 +67,7 @@ Parser::Parser(ParsingParams const& context, Vector<Token> tokens)
     , m_parsing_mode(context.mode)
     , m_tokens(move(tokens))
     , m_token_stream(m_tokens)
+    , m_value_context(move(context.value_context))
     , m_rule_context(move(context.rule_context))
     , m_declared_namespaces(move(context.declared_namespaces))
 {