Make DOMError constructible

LayoutTests/fast/dom/DOMError-constructor-expected.txt

Index: LayoutTests/fast/dom/DOMError-constructor-expected.txt
diff --git a/LayoutTests/fast/dom/DOMError-constructor-expected.txt b/LayoutTests/fast/dom/DOMError-constructor-expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..6223d09e6b0704f1b1323e7886a1a08daa110078
--- /dev/null
+++ b/LayoutTests/fast/dom/DOMError-constructor-expected.txt
@@ -0,0 +1,16 @@
+Tests that DOMError is constructible.
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+
+PASS error = new DOMError('NotFoundError', 'This item was not found.') did not throw exception.
+PASS error.name is "NotFoundError"
+PASS error.message is "This item was not found."
+PASS error = new DOMError('IndexSizeError') did not throw exception.
+PASS error.name is "IndexSizeError"
+PASS error.message is ""
+PASS new DOMError() threw exception TypeError: Failed to construct 'DOMError': 1 argument required, but only 0 present..
+PASS successfullyParsed is true
+
+TEST COMPLETE
+