Populates sourceDevice attribute into TouchEvent

Source/core/page/EventHandler.cpp

Index: Source/core/page/EventHandler.cpp
diff --git a/Source/core/page/EventHandler.cpp b/Source/core/page/EventHandler.cpp
index 12ebf8c1266bf7eab97ac2f212a228ceccf3a35b..e75d7aa83be57cf02dd06ee1225d671e26110d2e 100644
--- a/Source/core/page/EventHandler.cpp
+++ b/Source/core/page/EventHandler.cpp
@@ -4049,7 +4049,7 @@ bool EventHandler::handleTouchEvent(const PlatformTouchEvent& event)
             EventTarget* touchEventTarget = eventTarget.get();
             RefPtrWillBeRawPtr<TouchEvent> touchEvent = TouchEvent::create(
                 touches.get(), touchesByTarget.get(touchEventTarget), changedTouches[state].m_touches.get(),
-                stateName, touchEventTarget->toNode()->document().domWindow(),
+                stateName, touchEventTarget->toNode()->document().domWindow(), InputDevice::touchEventInstance(),
                 event.ctrlKey(), event.altKey(), event.shiftKey(), event.metaKey(), event.cancelable(), event.causesScrollingIfUncanceled(), event.timestamp());
             touchEventTarget->toNode()->dispatchTouchEvent(touchEvent.get());
             swallowedEvent = swallowedEvent || touchEvent->defaultPrevented() || touchEvent->defaultHandled();