ES6: Add support for super in object literals

src/ast.h

Index: src/ast.h
diff --git a/src/ast.h b/src/ast.h
index 170091616fee68ebf86ebda40f04dc060cd432ca..74e9531583cc529d263ac00e1de30d1218738e98 100644
--- a/src/ast.h
+++ b/src/ast.h
@@ -2497,6 +2497,7 @@ class FunctionLiteral FINAL : public Expression {
   bool is_expression() const { return IsExpression::decode(bitfield_); }
   bool is_anonymous() const { return IsAnonymous::decode(bitfield_); }
   StrictMode strict_mode() const;
+  bool needs_super_binding() const;
 
   int materialized_literal_count() { return materialized_literal_count_; }
   int expected_property_count() { return expected_property_count_; }