Removal of drag window to user tray icon functionality

ash/ash_switches.cc

Index: ash/ash_switches.cc
diff --git a/ash/ash_switches.cc b/ash/ash_switches.cc
index cdb49eeeea726e1f362308fb4d4a7c91ebb853ab..c46137d39f94657f94bbf7696c2f576727446ccd 100644
--- a/ash/ash_switches.cc
+++ b/ash/ash_switches.cc
@@ -109,9 +109,6 @@ const char kAshEnableImmersiveFullscreenForBrowserOnly[] =
 // Enables key bindings to scroll magnified screen.
 const char kAshEnableMagnifierKeyScroller[] =
     "ash-enable-magnifier-key-scroller";
-
-// Enables the multi user icons in the system tray.
-const char kAshEnableMultiUserTray[] = "ash-enable-multi-user-tray";
 #endif
 
 // Enables software based mirroring.
@@ -198,16 +195,6 @@ bool UseImmersiveFullscreenForAllWindows() {
       kAshEnableImmersiveFullscreenForBrowserOnly);
 }
 
-bool UseMultiUserTray() {
-#if defined(OS_CHROMEOS)
-  // TODO(skuhne): If this gets removed for good, remove also
-  // |SystemTray::user_items_| and the use of it.
-  return CommandLine::ForCurrentProcess()->HasSwitch(kAshEnableMultiUserTray);
-#else
-  return false;
-#endif
-}
-
 bool UseOverviewMode() {
   return !CommandLine::ForCurrentProcess()->HasSwitch(kAshDisableOverviewMode);
 }