NodeList.item() does not behave according to specification

LayoutTests/fast/dom/nodelist-item-parameter-expected.txt

Index: LayoutTests/fast/dom/nodelist-item-parameter-expected.txt
diff --git a/LayoutTests/fast/dom/nodelist-item-parameter-expected.txt b/LayoutTests/fast/dom/nodelist-item-parameter-expected.txt
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index 0000000000000000000000000000000000000000..867646c69542465530c46fc6ac4eaa5ad70739f3
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+++ b/LayoutTests/fast/dom/nodelist-item-parameter-expected.txt
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+Tests that the NodeList.item() argument is correctly validated.
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+
+PASS nodeList.__proto__ is NodeList.prototype
+PASS nodeList.item(0).id is "a"
+PASS nodeList.item(1).id is "b"
+PASS nodeList.item(2) is null
+PASS nodeList.item(-1) is null
+PASS nodeList.item(-4294967295).id is "b"
+PASS nodeList.item() threw exception TypeError: Not enough arguments.
+PASS successfullyParsed is true
+
+TEST COMPLETE
+