Fix ui::Event::Clone() for ui::PointerEvent.

ui/events/event.cc

Index: ui/events/event.cc
diff --git a/ui/events/event.cc b/ui/events/event.cc
index 6e1228c82d83b171518e0e71b81ce9af67ec3a91..2e465cf6865afb2da6487851a0682b7bc8855672 100644
--- a/ui/events/event.cc
+++ b/ui/events/event.cc
@@ -155,6 +155,11 @@ scoped_ptr<Event> Event::Clone(const Event& event) {
         new GestureEvent(static_cast<const GestureEvent&>(event)));
   }
 
+  if (event.IsPointerEvent()) {
+    return make_scoped_ptr(
+        new PointerEvent(static_cast<const PointerEvent&>(event)));
+  }
+
   if (event.IsScrollEvent()) {
     return make_scoped_ptr(
         new ScrollEvent(static_cast<const ScrollEvent&>(event)));
@@ -178,6 +183,16 @@ const GestureEvent* Event::AsGestureEvent() const {
   return static_cast<const GestureEvent*>(this);
 }
 
+PointerEvent* Event::AsPointerEvent() {
+  CHECK(IsPointerEvent());
+  return static_cast<PointerEvent*>(this);
+}
+
+const PointerEvent* Event::AsPointerEvent() const {
+  CHECK(IsPointerEvent());
+  return static_cast<const PointerEvent*>(this);
+}
+
 bool Event::HasNativeEvent() const {
   base::NativeEvent null_event;
   std::memset(&null_event, 0, sizeof(null_event));
@@ -644,6 +659,11 @@ void TouchEvent::FixRotationAngle() {
 ////////////////////////////////////////////////////////////////////////////////
 // PointerEvent
 
+PointerEvent::PointerEvent(const PointerEvent& pointer_event)
+    : LocatedEvent(pointer_event),
+      pointer_id_(pointer_event.pointer_id()),
+      details_(pointer_event.pointer_details()) {}
+
 PointerEvent::PointerEvent(const MouseEvent& mouse_event)
     : LocatedEvent(mouse_event),
       pointer_id_(kMousePointerId),