Make a strict function's "name" property non-writable.

test/mjsunit/regress/regress-1530.js

 // Copyright 2011 the V8 project authors. All rights reserved.
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 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
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 //       copyright notice, this list of conditions and the following
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@@ skipping 44 matching lines @@
 // Verify that the previous redefinition didn't screw up callbacks and
 // the internal value still gets updated.
 var z = { foo: 'other' };
 f.prototype = z;
 assertSame(f.prototype, z);
 assertSame(f.prototype.foo, 'other');
 assertSame(new f().foo, 'other');
 assertSame(Object.getPrototypeOf(new f()), z);
 assertSame(Object.getOwnPropertyDescriptor(f, 'prototype').value, z);
 
+// Verify that "name" is (initially) non-writable, but configurable.
+var fname = f.name;
+f.name = z;
+assertSame(fname, f.name);
+// Have to make "name"'s property descriptor explicitly writable
+// to alter its value in one go..shouldn't have to. Bug or grey
+// area of accessor resolution semantics?
+Object.defineProperty(f, 'name', { value: 'other', writable: true });
+assertSame('other', f.name);
+
 // 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: {} })");