Add support for DOM Level 3 WheelEvent

LayoutTests/fast/events/wheelevent-constructor-expected.txt

Index: LayoutTests/fast/events/wheelevent-constructor-expected.txt
diff --git a/LayoutTests/fast/events/wheelevent-constructor-expected.txt b/LayoutTests/fast/events/wheelevent-constructor-expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..fa35a481e4fa6b05dd04816cf811fd5169151c9c
--- /dev/null
+++ b/LayoutTests/fast/events/wheelevent-constructor-expected.txt
@@ -0,0 +1,21 @@
+Tests the constructor of the standard wheel event
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+
+PASS testEvent = new WheelEvent('wheel') did not throw exception.
+PASS testEvent.__proto__ is WheelEvent.prototype
+PASS testEvent.deltaX is 0
+PASS testEvent.deltaY is 0
+PASS testEvent.deltaZ is undefined.
+PASS testEvent.deltaMode is WheelEvent.DOM_DELTA_PIXEL
+PASS testEvent = new WheelEvent('wheel', { deltaX: 10, deltaY: 20, deltaMode: WheelEvent.DOM_DELTA_PAGE }) did not throw exception.
+PASS testEvent.__proto__ is WheelEvent.prototype
+PASS testEvent.deltaX is 10
+PASS testEvent.deltaY is 20
+PASS testEvent.deltaZ is undefined.
+PASS testEvent.deltaMode is WheelEvent.DOM_DELTA_PAGE
+PASS successfullyParsed is true
+
+TEST COMPLETE
+