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

chrome/common/pref_names.cc

Index: chrome/common/pref_names.cc
diff --git a/chrome/common/pref_names.cc b/chrome/common/pref_names.cc
index 3327c59b7c018cd4ba74ca31248b9e1ec7c70460..70dccca3b2b752f98671532c24c4c81b83868e5c 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -18,6 +18,11 @@ namespace prefs {
 // These are attached to the user profile
 
 #if defined(OS_CHROMEOS) && BUILDFLAG(ENABLE_APP_LIST)
+// Stores the user id received from DM Server when enrolling a Play user on an
+// Active Directory managed device. Used to report to DM Server that the account
+// is still used.
+const char kArcActiveDirectoryPlayUserId[] =
+    "arc.active_directory_play_user_id";
 // A preference to keep list of Android apps and their state.
 const char kArcApps[] = "arc.apps";
 // A preference to store backup and restore state for Android apps.