Setup Sync to use OAuth token for managed users.

chrome/browser/policy/cloud/user_policy_signin_service.cc

Index: chrome/browser/policy/cloud/user_policy_signin_service.cc
diff --git a/chrome/browser/policy/cloud/user_policy_signin_service.cc b/chrome/browser/policy/cloud/user_policy_signin_service.cc
index 46b60ca542c783409145a4d091439742f60ddd07..bd6518d00c1f607e2682eceb84ae6c010797402a 100644
--- a/chrome/browser/policy/cloud/user_policy_signin_service.cc
+++ b/chrome/browser/policy/cloud/user_policy_signin_service.cc
@@ -32,6 +32,10 @@
 #include "google_apis/gaia/oauth2_access_token_consumer.h"
 #include "google_apis/gaia/oauth2_access_token_fetcher.h"
 
+#if defined(ENABLE_MANAGED_USERS)
+#include "chrome/browser/managed_mode/managed_user_service.h"
+#endif
+
 namespace em = enterprise_management;
 
 namespace {
@@ -371,6 +375,11 @@ void UserPolicySigninService::Observe(
     return;
   }
 
+#if defined(ENABLE_MANAGED_USERS)
+  if (ManagedUserService::ProfileIsManaged(profile_))
+    return;
+#endif
+
   switch (type) {
     case chrome::NOTIFICATION_GOOGLE_SIGNED_OUT:
       ShutdownUserCloudPolicyManager();
@@ -399,7 +408,7 @@ void UserPolicySigninService::Observe(
           *(content::Details<const TokenService::TokenAvailableDetails>(
               details).ptr());
       if (token_details.service() ==
-          GaiaConstants::kGaiaOAuth2LoginRefreshToken) {
+              GaiaConstants::kGaiaOAuth2LoginRefreshToken) {
         SigninManager* signin_manager =
             SigninManagerFactory::GetForProfile(profile_);
         std::string username = signin_manager->GetAuthenticatedUsername();