Update ui::PointerEvent to support mouse wheel and capture change events.

ash/pointer_watcher_delegate_aura.cc

Index: ash/pointer_watcher_delegate_aura.cc
diff --git a/ash/pointer_watcher_delegate_aura.cc b/ash/pointer_watcher_delegate_aura.cc
index 541a2b5643c1d25ef057667b50c2ce1cc5648b45..3faff481e393113cf9f8d76c6f4394f1f3edf0cd 100644
--- a/ash/pointer_watcher_delegate_aura.cc
+++ b/ash/pointer_watcher_delegate_aura.cc
@@ -44,18 +44,12 @@ void PointerWatcherDelegateAura::RemovePointerWatcher(
 }
 
 void PointerWatcherDelegateAura::OnMouseEvent(ui::MouseEvent* event) {
-  if (event->type() == ui::ET_MOUSE_CAPTURE_CHANGED) {
-    FOR_EACH_OBSERVER(views::PointerWatcher, non_move_watchers_,
-                      OnMouseCaptureChanged());
-    FOR_EACH_OBSERVER(views::PointerWatcher, move_watchers_,
-                      OnMouseCaptureChanged());
-    return;
-  }
-
   // For compatibility with the mus version, don't send drags.
   if (event->type() != ui::ET_MOUSE_PRESSED &&
       event->type() != ui::ET_MOUSE_RELEASED &&
-      event->type() != ui::ET_MOUSE_MOVED)
+      event->type() != ui::ET_MOUSE_MOVED &&
+      event->type() != ui::ET_MOUSEWHEEL &&
+      event->type() != ui::ET_MOUSE_CAPTURE_CHANGED)
     return;
 
   DCHECK(ui::PointerEvent::CanConvertFrom(*event));