Make Error.prototype.toString spec compliant; and fix various side-effect-free error printing metho…

test/webkit/toString-recursion.js

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions
 // are met:
 // 1.  Redistributions of source code must retain the above copyright
 //     notice, this list of conditions and the following disclaimer.
 // 2.  Redistributions in binary form must reproduce the above copyright
 //     notice, this list of conditions and the following disclaimer in the
@@ skipping 10 matching lines @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 description(
 "This test checks that toString() does not have a problem when an object has itself as a property."
 );
 
 // Array (elements)
 shouldBe("var array = []; array[0] = array; array + ''", "''");
 
-// Error (name, message)
-shouldBe("var error = new Error; error.name = error; error.message = error; error + ''", "''");
-
 // RegExp (source)
 shouldBe("var regexp = /a/; regexp.source = regexp; regexp + ''", "'/a/'");