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..bf06e619b95f5441c94e091afa186482dc14a45c 100644
--- a/ash/laser/laser_pointer_view.h
+++ b/ash/laser/laser_pointer_view.h
@@ -35,6 +35,9 @@ class LaserPointerView : public views::View {
 
   void AddNewPoint(const gfx::Point& new_point);
   void Stop();
+  void SetIsFadingAway(bool is_fading);

[jdufault, 2016/09/23 23:59:20]

Rename to set_is_fading_away. Trival methods (like this one) should be inlined
as well.

[sammiequon, 2016/09/26 19:30:38]

Done.

+  bool GetIsFadingAway() const;

[jdufault, 2016/09/23 23:59:20]

Rename to is_fading_away() and inline the definition.

[sammiequon, 2016/09/26 19:30:38]

Done.

+
   aura::Window* GetRootWindow();
 
   // Reparents the widget if needed.
@@ -48,6 +51,11 @@ class LaserPointerView : public views::View {
 
   LaserPointerPoints laser_points_;
   std::unique_ptr<views::Widget> widget_;
+  // |is_fading_away_| determines whether the laser pointer view should accept
+  // points normally, or just advance the |laser_points_| time so that current
+  // points start fading away. This should be set to true when the view is about
+  // to be destroyed, such as when the stylus is released.
+  bool is_fading_away_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(LaserPointerView);
 };