Prepare SystemTray to support notifications

ash/system/network/tray_network.h

Index: ash/system/network/tray_network.h
diff --git a/ash/system/network/tray_network.h b/ash/system/network/tray_network.h
index 299dc03146a662a92240986b9f5b5988591dbe82..a16a3d4ef4571e72c869e6cc031b086843b46c63 100644
--- a/ash/system/network/tray_network.h
+++ b/ash/system/network/tray_network.h
@@ -8,7 +8,6 @@
 
 #include "ash/system/network/network_observer.h"
 #include "ash/system/tray/system_tray_item.h"
-#include "base/memory/scoped_ptr.h"
 
 namespace ash {
 namespace internal {
@@ -38,9 +37,9 @@ class TrayNetwork : public SystemTrayItem,
   // Overridden from NetworkObserver.
   virtual void OnNetworkRefresh(const NetworkIconInfo& info) OVERRIDE;
 
-  scoped_ptr<tray::NetworkTrayView> tray_;
-  scoped_ptr<tray::NetworkDefaultView> default_;
-  scoped_ptr<tray::NetworkDetailedView> detailed_;
+  tray::NetworkTrayView* tray_;
+  tray::NetworkDefaultView* default_;
+  tray::NetworkDetailedView* detailed_;
 
   DISALLOW_COPY_AND_ASSIGN(TrayNetwork);
 };