Added PointerEvent firing on touch events.

Source/core/dom/Node.cpp

Index: Source/core/dom/Node.cpp
diff --git a/Source/core/dom/Node.cpp b/Source/core/dom/Node.cpp
index eef69a897008bc9610bbd1a4f4d8e68ccaf53cd9..2d922722cd6d27062c182106ab2567ecb6c04856 100644
--- a/Source/core/dom/Node.cpp
+++ b/Source/core/dom/Node.cpp
@@ -72,6 +72,7 @@
 #include "core/events/KeyboardEvent.h"
 #include "core/events/MouseEvent.h"
 #include "core/events/MutationEvent.h"
+#include "core/events/PointerEvent.h"
 #include "core/events/TextEvent.h"
 #include "core/events/TouchEvent.h"
 #include "core/events/UIEvent.h"
@@ -2107,10 +2108,10 @@ void Node::dispatchScopedEventDispatchMediator(PassRefPtrWillBeRawPtr<EventDispa
 
 bool Node::dispatchEvent(PassRefPtrWillBeRawPtr<Event> event)
 {
-    if (event->isMouseEvent())
-        return EventDispatcher::dispatchEvent(*this, MouseEventDispatchMediator::create(static_pointer_cast<MouseEvent>(event), MouseEventDispatchMediator::SyntheticMouseEvent));
-    if (event->isTouchEvent())
-        return dispatchTouchEvent(static_pointer_cast<TouchEvent>(event));
+    // For a PointerEvent, MouseEvent or TouchEvent, the 'relatedTarget' property must be updated
+    // during dispatch. This generic dispatcher can't handle this.
+    RELEASE_ASSERT(!event->isPointerEvent() && !event->isMouseEvent() && !event->isTouchEvent());
+
     return EventDispatcher::dispatchEvent(*this, EventDispatchMediator::create(event));
 }
 
@@ -2160,6 +2161,11 @@ bool Node::dispatchTouchEvent(PassRefPtrWillBeRawPtr<TouchEvent> event)
     return EventDispatcher::dispatchEvent(*this, TouchEventDispatchMediator::create(event));
 }
 
+bool Node::dispatchPointerEvent(PassRefPtrWillBeRawPtr<PointerEvent> event)
+{
+    return EventDispatcher::dispatchEvent(*this, PointerEventDispatchMediator::create(event));
+}
+
 void Node::dispatchSimulatedClick(Event* underlyingEvent, SimulatedClickMouseEventOptions eventOptions)
 {
     EventDispatcher::dispatchSimulatedClick(*this, underlyingEvent, eventOptions);