cros: Laser pointer fades out on release, do not cover palette.

ash/laser/laser_pointer_view.h

Index: ash/laser/laser_pointer_view.h
diff --git a/ash/laser/laser_pointer_view.h b/ash/laser/laser_pointer_view.h
index 11ff272965901cbd8b7fb4433c2ba0adb999e3c9..d7e16585ddfd22afad0219b6b28fb5b50e20e27f 100644
--- a/ash/laser/laser_pointer_view.h
+++ b/ash/laser/laser_pointer_view.h
@@ -34,7 +34,9 @@ class LaserPointerView : public views::View {
   ~LaserPointerView() override;
 
   void AddNewPoint(const gfx::Point& new_point);
+  void UpdateTime();
   void Stop();
+
   aura::Window* GetRootWindow();
 
   // Reparents the widget if needed.
@@ -46,6 +48,8 @@ class LaserPointerView : public views::View {
   // view::View:
   void OnPaint(gfx::Canvas* canvas) override;
 
+  void OnPointsUpdated();
+
   LaserPointerPoints laser_points_;
   std::unique_ptr<views::Widget> widget_;