Parsing of basic module declarations (no imports/exports yet).

src/scopes.h

Index: src/scopes.h
diff --git a/src/scopes.h b/src/scopes.h
index 06202c493baa9ba43e3642238d96472460e73b33..5b645f29c20bfa66709410da56a1ba5172b4fc99 100644
--- a/src/scopes.h
+++ b/src/scopes.h
@@ -263,6 +263,7 @@ class Scope: public ZoneObject {
   // Specific scope types.
   bool is_eval_scope() const { return type_ == EVAL_SCOPE; }
   bool is_function_scope() const { return type_ == FUNCTION_SCOPE; }
+  bool is_module_scope() const { return type_ == MODULE_SCOPE; }
   bool is_global_scope() const { return type_ == GLOBAL_SCOPE; }
   bool is_catch_scope() const { return type_ == CATCH_SCOPE; }
   bool is_block_scope() const { return type_ == BLOCK_SCOPE; }