Remove the overflowchanged event with a runtime flag

LayoutTests/fast/events/constructors/overflow-event-constructor-expected.txt

Index: LayoutTests/fast/events/constructors/overflow-event-constructor-expected.txt
diff --git a/LayoutTests/fast/events/constructors/overflow-event-constructor-expected.txt b/LayoutTests/fast/events/constructors/overflow-event-constructor-expected.txt
deleted file mode 100644
index db13d76d0278eab01ff2a27f81e6a8c0a49153d7..0000000000000000000000000000000000000000
--- a/LayoutTests/fast/events/constructors/overflow-event-constructor-expected.txt
+++ /dev/null
@@ -1,49 +0,0 @@
-This tests the constructor for the OverflowEvent DOM class.
-
-On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
-
-
-PASS new OverflowEvent('eventType').bubbles is false
-PASS new OverflowEvent('eventType').cancelable is false
-PASS new OverflowEvent('eventType').horizontalOverflow is false
-PASS new OverflowEvent('eventType').verticalOverflow is false
-PASS new OverflowEvent('eventType').orient is 0
-PASS new OverflowEvent('eventType', { bubbles: false }).bubbles is false
-PASS new OverflowEvent('eventType', { bubbles: true }).bubbles is true
-PASS new OverflowEvent('eventType', { cancelable: false }).cancelable is false
-PASS new OverflowEvent('eventType', { cancelable: true }).cancelable is true
-PASS new OverflowEvent('eventType', { horizontalOverflow: false }).horizontalOverflow is false
-PASS new OverflowEvent('eventType', { horizontalOverflow: true }).horizontalOverflow is true
-PASS new OverflowEvent('eventType', { verticalOverflow: false }).verticalOverflow is false
-PASS new OverflowEvent('eventType', { verticalOverflow: true }).verticalOverflow is true
-PASS new OverflowEvent('eventType', { orient: 0 }).orient is 0
-PASS new OverflowEvent('eventType', { orient: 1 }).orient is 1
-PASS new OverflowEvent('eventType', { orient: 65534 }).orient is 65534
-PASS new OverflowEvent('eventType', { orient: 65535 }).orient is 65535
-PASS new OverflowEvent('eventType', { orient: 9007199254740991 }).orient is 65535
-PASS new OverflowEvent('eventType', { orient: 18446744073709551615 }).orient is 0
-PASS new OverflowEvent('eventType', { orient: 12345678901234567890 }).orient is 2048
-PASS new OverflowEvent('eventType', { orient: -1 }).orient is 65535
-PASS new OverflowEvent('eventType', { orient: 123.45 }).orient is 123
-PASS new OverflowEvent('eventType', { orient: NaN }).orient is 0
-PASS new OverflowEvent('eventType', { orient: undefined }).orient is 0
-PASS new OverflowEvent('eventType', { orient: null }).orient is 0
-PASS new OverflowEvent('eventType', { orient: '' }).orient is 0
-PASS new OverflowEvent('eventType', { orient: '12345' }).orient is 12345
-PASS new OverflowEvent('eventType', { orient: '12345a' }).orient is 0
-PASS new OverflowEvent('eventType', { orient: 'abc' }).orient is 0
-PASS new OverflowEvent('eventType', { orient: [] }).orient is 0
-PASS new OverflowEvent('eventType', { orient: [12345] }).orient is 12345
-PASS new OverflowEvent('eventType', { orient: [12345, 67890] }).orient is 0
-PASS new OverflowEvent('eventType', { orient: {} }).orient is 0
-PASS new OverflowEvent('eventType', { orient: {foo: 12345} }).orient is 0
-PASS new OverflowEvent('eventType', { orient: {valueOf: function () { return 12345; }} }).orient is 12345
-PASS new OverflowEvent('eventType', { bubbles: true, cancelable: true, horizontalOverflow: true, verticalOverflow: true, orient: 12345 }).bubbles is true
-PASS new OverflowEvent('eventType', { bubbles: true, cancelable: true, horizontalOverflow: true, verticalOverflow: true, orient: 12345 }).cancelable is true
-PASS new OverflowEvent('eventType', { bubbles: true, cancelable: true, horizontalOverflow: true, verticalOverflow: true, orient: 12345 }).horizontalOverflow is true
-PASS new OverflowEvent('eventType', { bubbles: true, cancelable: true, horizontalOverflow: true, verticalOverflow: true, orient: 12345 }).verticalOverflow is true
-PASS new OverflowEvent('eventType', { bubbles: true, cancelable: true, horizontalOverflow: true, verticalOverflow: true, orient: 12345 }).orient is 12345
-PASS successfullyParsed is true
-
-TEST COMPLETE
-