Move //chrome/browser/{chromeos => ash}/policy [4/10]

enrollment/, and external_data/ are moved to //chrome/browser/ash/policy.

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

Bug: 1164001
Change-Id: I905534a81e86b9ce362d709df9cb712b970776f7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2984383
Reviewed-by: Hidehiko Abe <[email protected]>
Owners-Override: Hidehiko Abe <[email protected]>
Commit-Queue: Yeunjoo Choi <[email protected]>
Cr-Commit-Position: refs/heads/master@{#898805}
diff --git a/chrome/browser/prefs/browser_prefs.cc b/chrome/browser/prefs/browser_prefs.cc
index 6d8a85c..98e70552 100644
--- a/chrome/browser/prefs/browser_prefs.cc
+++ b/chrome/browser/prefs/browser_prefs.cc
@@ -313,6 +313,9 @@
 #include "chrome/browser/ash/policy/core/device_cloud_policy_manager_chromeos.h"
 #include "chrome/browser/ash/policy/core/dm_token_storage.h"
 #include "chrome/browser/ash/policy/dlp/dlp_rules_manager_impl.h"
+#include "chrome/browser/ash/policy/enrollment/auto_enrollment_client_impl.h"
+#include "chrome/browser/ash/policy/enrollment/enrollment_requisition_manager.h"
+#include "chrome/browser/ash/policy/external_data/handlers/device_wallpaper_image_external_data_handler.h"
 #include "chrome/browser/ash/power/auto_screen_brightness/metrics_reporter.h"
 #include "chrome/browser/ash/power/power_metrics_reporter.h"
 #include "chrome/browser/ash/release_notes/release_notes_storage.h"
@@ -327,9 +330,6 @@
 #include "chrome/browser/chromeos/first_run/first_run.h"
 #include "chrome/browser/chromeos/full_restore/full_restore_prefs.h"
 #include "chrome/browser/chromeos/net/network_throttling_observer.h"
-#include "chrome/browser/chromeos/policy/enrollment/auto_enrollment_client_impl.h"
-#include "chrome/browser/chromeos/policy/enrollment/enrollment_requisition_manager.h"
-#include "chrome/browser/chromeos/policy/external_data/handlers/device_wallpaper_image_external_data_handler.h"
 #include "chrome/browser/chromeos/policy/handlers/adb_sideloading_allowance_mode_policy_handler.h"
 #include "chrome/browser/chromeos/policy/handlers/minimum_version_policy_handler.h"
 #include "chrome/browser/chromeos/policy/networking/policy_cert_service_factory.h"