Reland of Preparse functions in the scope that was created when parsing of the function was started

src/parsing/parser-base.h

Index: src/parsing/parser-base.h
diff --git a/src/parsing/parser-base.h b/src/parsing/parser-base.h
index 5b21c539f2470b049c91106fb4ba9ec4b50d20e4..2da0a0167c3474d42d181ff6fe3a2363230ff5d2 100644
--- a/src/parsing/parser-base.h
+++ b/src/parsing/parser-base.h
@@ -381,8 +381,13 @@
   class FunctionState final : public ScopeState {
    public:
     FunctionState(FunctionState** function_state_stack,
-                  ScopeState** scope_stack, Scope* scope, FunctionKind kind);
+                  ScopeState** scope_stack, DeclarationScope* scope,
+                  FunctionKind kind);
     ~FunctionState();
+
+    DeclarationScope* scope() const {
+      return ScopeState::scope()->AsDeclarationScope();
+    }
 
     int NextMaterializedLiteralIndex() {
       return next_materialized_literal_index_++;
@@ -1449,7 +1454,7 @@
 template <typename Impl>
 ParserBase<Impl>::FunctionState::FunctionState(
     FunctionState** function_state_stack, ScopeState** scope_stack,
-    Scope* scope, FunctionKind kind)
+    DeclarationScope* scope, FunctionKind kind)
     : ScopeState(scope_stack, scope),
       next_materialized_literal_index_(0),
       expected_property_count_(0),