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

test/webkit/toString-recursion.js

Index: test/webkit/toString-recursion.js
diff --git a/test/webkit/toString-recursion.js b/test/webkit/toString-recursion.js
index 51e9f98c2d28665b9a969aa801aacad83c548856..c0e68f3ecc0b16d51df37c2aa0ee2ef34b0af751 100644
--- a/test/webkit/toString-recursion.js
+++ b/test/webkit/toString-recursion.js
@@ -28,8 +28,5 @@ description(
 // 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/'");