Chromad: Use DM server reply to determine enrollment type

chrome/browser/ui/webui/chromeos/login/enrollment_screen_handler.cc

Index: chrome/browser/ui/webui/chromeos/login/enrollment_screen_handler.cc
diff --git a/chrome/browser/ui/webui/chromeos/login/enrollment_screen_handler.cc b/chrome/browser/ui/webui/chromeos/login/enrollment_screen_handler.cc
index 2b4a49d805dfefa6b4dc2ff46f2ca94717b917fd..33204dc52a01a85b0a31220e05ec7ab1234d62e7 100644
--- a/chrome/browser/ui/webui/chromeos/login/enrollment_screen_handler.cc
+++ b/chrome/browser/ui/webui/chromeos/login/enrollment_screen_handler.cc
@@ -186,7 +186,9 @@ void EnrollmentScreenHandler::ShowSigninScreen() {
   ShowStep(kEnrollmentStepSignin);
 }
 
-void EnrollmentScreenHandler::ShowAdJoin() {
+void EnrollmentScreenHandler::ShowAdJoin(
+    OnAdJoinedCallback on_joined_callback) {
+  on_joined_callback_ = std::move(on_joined_callback);
   observe_network_failure_ = false;
   ShowStep(kEnrollmentStepAdJoin);
 }
@@ -578,7 +580,8 @@ void EnrollmentScreenHandler::HandleAdDomainJoin(
     authpolicy::ErrorType code) {
   switch (code) {
     case authpolicy::ERROR_NONE:
-      controller_->OnAdJoined(gaia::ExtractDomainName(user_name));
+      ShowEnrollmentSpinnerScreen();
+      std::move(on_joined_callback_).Run(gaia::ExtractDomainName(user_name));

[achuithb, 2017/02/07 20:27:17]

Is this your way of setting on_joined_callback_ to null? I don't think we should
use std::move here.

[Roman Sorokin (ftl), 2017/02/10 14:57:10]

This is the way to consume OnceCallbacks according to 
https://cs.chromium.org/chromium/src/docs/callback.md

[achuithb, 2017/02/13 13:39:02]

Acknowledged.

       return;
     case authpolicy::ERROR_UNKNOWN:
     case authpolicy::ERROR_DBUS_FAILURE: