[modules] Refactor parsing of anonymous declarations in default exports.

src/ast/ast-value-factory.h

Index: src/ast/ast-value-factory.h
diff --git a/src/ast/ast-value-factory.h b/src/ast/ast-value-factory.h
index b0019a5b2ca4dff010b0b4c1707780f24cce1742..fdca2fed0b615a6c5a573e5e32ef8e4f22a64ae7 100644
--- a/src/ast/ast-value-factory.h
+++ b/src/ast/ast-value-factory.h
@@ -267,6 +267,7 @@ class AstValue : public ZoneObject {
   F(prototype, "prototype")                     \
   F(return, "return")                           \
   F(set_space, "set ")                          \
+  F(star_default_star, "*default*")             \
   F(this, "this")                               \
   F(this_function, ".this_function")            \
   F(throw, "throw")                             \