Add ManagedUserService for profile-specific managed user data.

chrome/browser/managed_mode/managed_mode_site_list.h

Index: chrome/browser/managed_mode/managed_mode_site_list.h
diff --git a/chrome/browser/managed_mode/managed_mode_site_list.h b/chrome/browser/managed_mode/managed_mode_site_list.h
index 4757764354f90c732caba9e6ecd71d4ab8442804..015b005a93ac1c02f58111d5ded1c72cd92b048e 100644
--- a/chrome/browser/managed_mode/managed_mode_site_list.h
+++ b/chrome/browser/managed_mode/managed_mode_site_list.h
@@ -62,6 +62,10 @@ class ManagedModeSiteList {
                       const ExtensionResource& path);
   ~ManagedModeSiteList();
 
+  // Creates a copy of the site list.
+  // Caller takes ownership of the returned value.
+  ManagedModeSiteList* Clone();
+
   // Returns a list of all categories.
   // TODO(bauerb): The list is hardcoded for now, but if we allow custom
   // categories, this should live in some registry.