Include KPM header in CrOS builds only

Change-Id: Ica5f90107d05bca69ecfb44b652ca24d35a3bf81
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2516699
Commit-Queue: Gabriel Charette <gab@chromium.org>
Reviewed-by: Gabriel Charette <gab@chromium.org>
Reviewed-by: Pavol Marko <pmarko@chromium.org>
Cr-Commit-Position: refs/heads/master@{#823594}

chrome/browser/prefs/browser_prefs.cc

@@ -16,7 +16,6 @@
 #include "chrome/browser/availability/availability_prober.h"
 #include "chrome/browser/browser_process_impl.h"
 #include "chrome/browser/chrome_content_browser_client.h"
-#include "chrome/browser/chromeos/platform_keys/key_permissions/key_permissions_manager_impl.h"
 #include "chrome/browser/chromeos/policy/adb_sideloading_allowance_mode_policy_handler.h"
 #include "chrome/browser/chromeos/policy/tpm_auto_update_mode_policy_handler.h"
 #include "chrome/browser/chromeos/printing/print_management/printing_manager_factory.h"
@@ -178,6 +177,7 @@
 #include "chrome/browser/chromeos/kerberos/kerberos_credentials_manager.h"
 #include "chrome/browser/chromeos/login/easy_unlock/easy_unlock_service.h"
 #include "chrome/browser/chromeos/login/existing_user_controller.h"
+#include "chrome/browser/chromeos/platform_keys/key_permissions/key_permissions_manager_impl.h"
 #include "chrome/browser/chromeos/policy/system_features_disable_list_policy_handler.h"
 #include "chrome/browser/chromeos/policy/system_proxy_manager.h"
 #include "chrome/browser/chromeos/settings/stats_reporting_controller.h"