Revert of Multiprofile security: Show a warning messagebox when desktop casting/sharing is turned on upon user

ash/system/tray/system_tray.h

Index: ash/system/tray/system_tray.h
diff --git a/ash/system/tray/system_tray.h b/ash/system/tray/system_tray.h
index 301ef130d95be17130a2372d5fba68a82e1213c9..2df725daac7d7a614633c59cb7d3afc805a0c9e8 100644
--- a/ash/system/tray/system_tray.h
+++ b/ash/system/tray/system_tray.h
@@ -20,7 +20,6 @@
 #include <vector>
 
 namespace ash {
-class ScreenTrayItem;
 class SystemBubbleWrapper;
 class SystemTrayDelegate;
 class SystemTrayItem;
@@ -142,9 +141,6 @@
       AnchorAlignment anchor_alignment) const OVERRIDE;
   virtual void HideBubble(const views::TrayBubbleView* bubble_view) OVERRIDE;
 
-  ScreenTrayItem* GetScreenShareItem() { return screen_share_tray_item_; }
-  ScreenTrayItem* GetScreenCaptureItem() { return screen_capture_tray_item_; }
-
   TrayAccessibility* GetTrayAccessibilityForTest() {
     return tray_accessibility_;
   }
@@ -236,10 +232,6 @@
   TrayAccessibility* tray_accessibility_;  // not owned
   TrayDate* tray_date_;
 
-  // A reference to the Screen share and capture item.
-  ScreenTrayItem* screen_capture_tray_item_;  // not owned
-  ScreenTrayItem* screen_share_tray_item_;  // not owned
-
   DISALLOW_COPY_AND_ASSIGN(SystemTray);
 };