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

ash/wm/immersive_fullscreen_controller.cc

Index: ash/wm/immersive_fullscreen_controller.cc
diff --git a/ash/wm/immersive_fullscreen_controller.cc b/ash/wm/immersive_fullscreen_controller.cc
index d284041fa66a778157cab97968b6d966a15f4aab..31b82a41b9853e65a09cd9e2ec77cd83b348e5ed 100644
--- a/ash/wm/immersive_fullscreen_controller.cc
+++ b/ash/wm/immersive_fullscreen_controller.cc
@@ -275,7 +275,12 @@ void ImmersiveFullscreenController::OnPointerEventObserved(
     const ui::PointerEvent& event,
     const gfx::Point& location_in_screen,
     views::Widget* target) {
-  if (event.IsMousePointerEvent()) {
+  if (event.type() == ui::ET_POINTER_CAPTURE_CHANGED) {
+    const ui::MouseEvent event(ui::ET_MOUSE_CAPTURE_CHANGED, gfx::Point(),
+                               gfx::Point(), ui::EventTimeForNow(), 0, 0);
+    OnMouseEvent(event, display::Screen::GetScreen()->GetCursorScreenPoint(),
+                 nullptr);

[sadrul, 2016/08/19 04:18:27]

Do you need this special block? You have already updated the
MouseEvent(PointerEvent) to do the right thing for CAPTURE_CHANGED events. So
the current code should just work?

[riajiang, 2016/08/19 16:19:39]

Removed. I was not getting the right target and location in
PointerWatcherDelegateAura::NotifyWatchers so it was not working without this
block.

+  } else if (event.IsMousePointerEvent()) {
     const ui::MouseEvent mouse_event(event);
     OnMouseEvent(mouse_event, location_in_screen, target);
   } else {
@@ -285,13 +290,6 @@ void ImmersiveFullscreenController::OnPointerEventObserved(
   }
 }
 
-void ImmersiveFullscreenController::OnMouseCaptureChanged() {
-  const ui::MouseEvent event(ui::ET_MOUSE_CAPTURE_CHANGED, gfx::Point(),
-                             gfx::Point(), ui::EventTimeForNow(), 0, 0);
-  OnMouseEvent(event, display::Screen::GetScreen()->GetCursorScreenPoint(),
-               nullptr);
-}
-
 ////////////////////////////////////////////////////////////////////////////////
 // views::WidgetObserver overrides: