Apply OEM default app from customization manifest

BUG=343589
TEST=unit_test + manual

Review URL: https://codereview.chromium.org/184873003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255107 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/prefs/browser_prefs.cc b/chrome/browser/prefs/browser_prefs.cc
index 09b47be..f613563 100644
--- a/chrome/browser/prefs/browser_prefs.cc
+++ b/chrome/browser/prefs/browser_prefs.cc
@@ -439,6 +439,7 @@
   chromeos::Preferences::RegisterProfilePrefs(registry);
   chromeos::proxy_config::RegisterProfilePrefs(registry);
   chromeos::SAMLOfflineSigninLimiter::RegisterProfilePrefs(registry);
+  chromeos::ServicesCustomizationDocument::RegisterProfilePrefs(registry);
   chromeos::UserImageSyncObserver::RegisterProfilePrefs(registry);
   extensions::EnterprisePlatformKeysPrivateChallengeUserKeyFunction::
       RegisterProfilePrefs(registry);