Improve coverage for Error.prototype.name

Extend coverage to include the property's writability and
configurability. Use the conventional `verifyProperty` harness function
to consolidate tests.

test/built-ins/Error/prototype/name/15.11.4.2-1.js

@@ -1,11 +0,0 @@
-// Copyright (c) 2012 Ecma International.  All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-es5id: 15.11.4.2-1
-description: Error.prototype.name is not enumerable.
----*/
-
-for (var i in Error.prototype) {
-  assert.notSameValue(i, "name", 'i');
-}

test/built-ins/Error/prototype/name/S15.11.4.2_A1.js

@@ -1,16 +0,0 @@
-// Copyright 2009 the Sputnik authors.  All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-info: The Error.prototype has name property
-es5id: 15.11.4.2_A1
-description: Checking Error.prototype.name
----*/
-
-//////////////////////////////////////////////////////////////////////////////
-// CHECK#1
-if (!Error.prototype.hasOwnProperty('name')) {
-  throw new Test262Error('#1: Error.prototype.hasOwnProperty(\'name\') return true. Actual: ' + Error.prototype.hasOwnProperty('name'));
-}
-//
-//////////////////////////////////////////////////////////////////////////////

test/built-ins/Error/prototype/name/S15.11.4.2_A2.js

@@ -1,16 +0,0 @@
-// Copyright 2009 the Sputnik authors.  All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-info: The initial value of Error.prototype.name is "Error"
-es5id: 15.11.4.2_A2
-description: Checking value of Error.prototype.name
----*/
-
-//////////////////////////////////////////////////////////////////////////////
-// CHECK#1
-if (Error.prototype.name !== "Error") {
-  throw new Test262Error('#1: Error.prototype.name==="Error". Actual: ' + Error.prototype.name);
-}
-//
-//////////////////////////////////////////////////////////////////////////////

test/built-ins/Error/prototype/name/prop-desc.js

@@ -0,0 +1,14 @@
+// Copyright (c) 2021 the V8 project authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-error.prototype.name
+description: Property descriptor of Error.prototype.name
+includes: [propertyHelper.js]
+---*/
+
+verifyProperty(Error.prototype, 'name', {
+  enumerable: false,
+  writable: true,
+  configurable: true,
+  value: 'Error'
+});