Remove scoped_ptr for system tray views

ash/system/power/tray_power.h

Index: ash/system/power/tray_power.h
diff --git a/ash/system/power/tray_power.h b/ash/system/power/tray_power.h
index 713370f59b9b19fde1f0d7f7827af97259a61d43..548f00597561e1c73ffb12b96b9d3b337a3fb232 100644
--- a/ash/system/power/tray_power.h
+++ b/ash/system/power/tray_power.h
@@ -37,9 +37,9 @@ class TrayPower : public SystemTrayItem,
   // Overridden from PowerStatusObserver.
   virtual void OnPowerStatusChanged(const PowerSupplyStatus& status) OVERRIDE;
 
-  scoped_ptr<tray::DateView> date_;
-  scoped_ptr<tray::PowerPopupView> power_;
-  scoped_ptr<tray::PowerTrayView> power_tray_;
+  tray::DateView* date_;
+  tray::PowerPopupView* power_;
+  tray::PowerTrayView* power_tray_;
 
   DISALLOW_COPY_AND_ASSIGN(TrayPower);
 };