Policy to control ARC Backup&Restore.

chrome/common/pref_names.h

Index: chrome/common/pref_names.h
diff --git a/chrome/common/pref_names.h b/chrome/common/pref_names.h
index 8b68eca2bfb47622527ab7737f247bb6cbdc8c73..68d61889846f30cb0dc8e34aa542d26cf0edf29c 100644
--- a/chrome/common/pref_names.h
+++ b/chrome/common/pref_names.h
@@ -18,6 +18,7 @@ namespace prefs {
 #if defined(OS_CHROMEOS) && defined(ENABLE_APP_LIST)
 extern const char kArcApps[];
 extern const char kArcBackupRestoreEnabled[];
+extern const char kArcBackupRestoreManaged[];

[Thiemo Nagel, 2016/07/12 15:02:40]

I'm not sure what's the purpose of that pref.  I'd assume that there is a
simpler way than creating a dedicated pref.

[Sergey Poromov, 2016/07/12 16:18:11]

I didn't know that it's easy to know whether pref is managed by checking the
pref itself. Removed the pref and large part of the change as well.

 extern const char kArcEnabled[];
 extern const char kArcPackages[];
 extern const char kArcSetNotificationsEnabledDeferred[];