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 11b40c6d79a0f0e85b5aee4dac2d82a4d211276a..0c24f8ceffe6a417afa502738b02fbd3aacf14ce 100644
--- a/ash/ash_switches.h
+++ b/ash/ash_switches.h
@@ -78,9 +78,6 @@ 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();