Move //chrome/browser/ui/webui/{chromeos=>ash}/login [3/3]

This CL moves remaining files to ash/login and cleans up chromeos/login.

This CL is part of the ChromeOS source code directory migration:
https://docs.google.com/document/d/1g-98HpzA8XcoGBWUv1gQNr4rbnD5yfvbtYZyPDDbkaE.

Bug: 1164001
Change-Id: Id820dbe2f7049b5f1a246e45a15b2028b32f85e2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3970203
Owners-Override: James Cook <[email protected]>
Commit-Queue: Yeunjoo Choi <[email protected]>
Reviewed-by: James Cook <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1065802}
diff --git a/chrome/browser/prefs/browser_prefs.cc b/chrome/browser/prefs/browser_prefs.cc
index 3fed4f0..bd3d290a 100644
--- a/chrome/browser/prefs/browser_prefs.cc
+++ b/chrome/browser/prefs/browser_prefs.cc
@@ -394,7 +394,7 @@
 #include "chrome/browser/ui/app_list/arc/arc_app_list_prefs.h"
 #include "chrome/browser/ui/ash/shelf/chrome_shelf_prefs.h"
 #include "chrome/browser/ui/webui/ash/login/enable_debugging_screen_handler.h"
-#include "chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h"
+#include "chrome/browser/ui/webui/ash/login/signin_screen_handler.h"
 #include "chrome/browser/ui/webui/settings/ash/os_settings_ui.h"
 #include "chrome/browser/upgrade_detector/upgrade_detector_chromeos.h"
 #include "chromeos/ash/components/audio/audio_devices_pref_handler_impl.h"