Suppress Stylus Welcome bubble in KioskNext in Chromeos

Bug: 969227
Change-Id: Ide1703ae4e37a22535c6d1f4034f7d55d716e635
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1638963Reviewed-by: James Cook <jamescook@chromium.org>
Reviewed-by: Sammie Quon <sammiequon@chromium.org>
Commit-Queue: Yilkal Abe <yilkal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#665655}

ash/system/palette/palette_welcome_bubble.cc

@@ -6,6 +6,7 @@
 
 #include <memory>
 
+#include "ash/kiosk_next/kiosk_next_shell_controller.h"
 #include "ash/public/cpp/ash_pref_names.h"
 #include "ash/public/cpp/shell_window_ids.h"
 #include "ash/session/session_controller_impl.h"
@@ -121,6 +122,9 @@ void PaletteWelcomeBubble::ShowIfNeeded() {
     return;
   }
 
+  if (Shell::Get()->kiosk_next_shell_controller()->IsEnabled())
+    return;
+
   if (!HasBeenShown())
     Show();
 }