Save Play user id when ARC user gets a Managed Google Play account

chrome/browser/chromeos/arc/auth/arc_active_directory_enrollment_token_fetcher.h

Index: chrome/browser/chromeos/arc/auth/arc_active_directory_enrollment_token_fetcher.h
diff --git a/chrome/browser/chromeos/arc/auth/arc_active_directory_enrollment_token_fetcher.h b/chrome/browser/chromeos/arc/auth/arc_active_directory_enrollment_token_fetcher.h
index c05a80f4b4d07c212cbb13597a4a17e15ab68324..3a63dfc54bedf2ddf57e82c5d3cdf57d8a10ecac 100644
--- a/chrome/browser/chromeos/arc/auth/arc_active_directory_enrollment_token_fetcher.h
+++ b/chrome/browser/chromeos/arc/auth/arc_active_directory_enrollment_token_fetcher.h
@@ -23,6 +23,10 @@ class DeviceManagementRequestJob;
 class DMTokenStorage;
 }  // namespace policy
 
+namespace user_prefs {
+class PrefRegistrySyncable;
+}  // namespace user_prefs
+
 namespace arc {
 
 // This class is responsible to fetch an enrollment token for a new managed
@@ -32,6 +36,8 @@ class ArcActiveDirectoryEnrollmentTokenFetcher : public ArcAuthInfoFetcher {
   ArcActiveDirectoryEnrollmentTokenFetcher();
   ~ArcActiveDirectoryEnrollmentTokenFetcher() override;
 
+  static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
+
   // ArcAuthInfoFetcher:
   void Fetch(const FetchCallback& callback) override;