Removal of drag window to user tray icon functionality

ash/ash_switches.h

Index: ash/ash_switches.h
diff --git a/ash/ash_switches.h b/ash/ash_switches.h
index 8837061b158eb9cccbf3dda6029d42f054371740..08b28f4a206a5711e07b0a2ea009ebf68c9095b8 100644
--- a/ash/ash_switches.h
+++ b/ash/ash_switches.h
@@ -77,9 +77,6 @@ ASH_EXPORT bool UseDragOffShelf();
 // immersive fullscreen via <F4>.
 ASH_EXPORT bool UseImmersiveFullscreenForAllWindows();
 
-// Returns true if multiple user icons are allowed in the tray.
-ASH_EXPORT bool UseMultiUserTray();
-
 // Returns true if overview mode should be activated for window switching.
 ASH_EXPORT bool UseOverviewMode();