Implement UIEvent.sourceDevice

LayoutTests/fast/events/uievent-with-inputdevice-expected.txt

Index: LayoutTests/fast/events/uievent-with-inputdevice-expected.txt
diff --git a/LayoutTests/fast/events/uievent-with-inputdevice-expected.txt b/LayoutTests/fast/events/uievent-with-inputdevice-expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..183313794d441782fbb66f9893643b6cfb06f8ef
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+++ b/LayoutTests/fast/events/uievent-with-inputdevice-expected.txt
@@ -0,0 +1,15 @@
+This tests that UIEvent will have sourceDevice set to be null by default, and it can also be passed when initialization.
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+
+PASS event is non-null.
+PASS event.sourceDevice is null
+PASS new UIEvent('eventType', { sourceDevice: new InputDevice({ firesTouchEvents: false }) }).sourceDevice is non-null.
+PASS new UIEvent('eventType', { sourceDevice: new InputDevice({ firesTouchEvents: false }) }).sourceDevice.firesTouchEvents is false
+PASS new UIEvent('eventType', { sourceDevice: new InputDevice({ firesTouchEvents: true }) }).sourceDevice is non-null.
+PASS new UIEvent('eventType', { sourceDevice: new InputDevice({ firesTouchEvents: true }) }).sourceDevice.firesTouchEvents is true
+PASS successfullyParsed is true
+
+TEST COMPLETE
+