[destructuring] Re-index materialized literals in arrow function parameters.

src/ast.h

Index: src/ast.h
diff --git a/src/ast.h b/src/ast.h
index a70b1fbfac80e4f6778d90b5b1c7402288a24b57..e8a8e0e012067e56f5df9dd82fa4893729670425 100644
--- a/src/ast.h
+++ b/src/ast.h
@@ -1298,6 +1298,8 @@ class Literal final : public Expression {
 };
 
 
+class AstLiteralReindexer;
+
 // Base class for literals that needs space in the corresponding JSFunction.
 class MaterializedLiteral : public Expression {
  public:
@@ -1349,6 +1351,8 @@ class MaterializedLiteral : public Expression {
   bool is_simple_;
   bool is_strong_;
   int depth_;
+
+  friend class AstLiteralReindexer;
 };