Revert of ES6: Make function name configurable

test/mjsunit/regress/regress-1530.js

Index: test/mjsunit/regress/regress-1530.js
diff --git a/test/mjsunit/regress/regress-1530.js b/test/mjsunit/regress/regress-1530.js
index b0daa2c94e53ecbd1d2d84c0da5ca0030398d070..20d1f265c092b6b02bac7e9cd7d9608ffb8f8364 100644
--- a/test/mjsunit/regress/regress-1530.js
+++ b/test/mjsunit/regress/regress-1530.js
@@ -80,9 +80,8 @@
 assertThrows("'use strict'; f.prototype = {}");
 assertThrows("Object.defineProperty(f, 'prototype', { value: {} })");
 
-// Verify that non-configurability of other properties is respected, but
-// non-writability is ignored by Object.defineProperty().
-Object.defineProperty(f, 'name', { value: {} });
+// Verify that non-writability of other properties is respected.
+assertThrows("Object.defineProperty(f, 'name', { value: {} })");
 assertThrows("Object.defineProperty(f, 'length', { value: {} })");
 assertThrows("Object.defineProperty(f, 'caller', { value: {} })");
 assertThrows("Object.defineProperty(f, 'arguments', { value: {} })");