Wallpaper manager now observing user child user status to update default wallpaper.

chrome/browser/ui/ash/multi_user/multi_user_notification_blocker_chromeos_unittest.cc

Index: chrome/browser/ui/ash/multi_user/multi_user_notification_blocker_chromeos_unittest.cc
diff --git a/chrome/browser/ui/ash/multi_user/multi_user_notification_blocker_chromeos_unittest.cc b/chrome/browser/ui/ash/multi_user/multi_user_notification_blocker_chromeos_unittest.cc
index 28bed7cfe66bdab371fb6c6831ee9d54ccef4afa..7373454abadecf5cd27930518eac4b16be9a4bf3 100644
--- a/chrome/browser/ui/ash/multi_user/multi_user_notification_blocker_chromeos_unittest.cc
+++ b/chrome/browser/ui/ash/multi_user/multi_user_notification_blocker_chromeos_unittest.cc
@@ -8,10 +8,12 @@
 #include "ash/test/ash_test_base.h"
 #include "ash/test/test_session_state_delegate.h"
 #include "ash/test/test_shell_delegate.h"
+#include "chrome/browser/chromeos/login/users/scoped_user_manager_enabler.h"
 #include "chrome/browser/ui/ash/multi_user/multi_user_notification_blocker_chromeos.h"
 #include "chrome/browser/ui/ash/multi_user/multi_user_window_manager_chromeos.h"
 #include "chrome/test/base/testing_browser_process.h"
 #include "chrome/test/base/testing_profile_manager.h"
+#include "components/user_manager/fake_user_manager.h"
 #include "components/user_manager/user_info.h"
 #include "ui/message_center/message_center.h"
 #include "ui/message_center/notification.h"
@@ -23,7 +25,9 @@ class MultiUserNotificationBlockerChromeOSTest
   MultiUserNotificationBlockerChromeOSTest()
       : state_changed_count_(0),
         testing_profile_manager_(TestingBrowserProcess::GetGlobal()),
-        window_id_(0) {}
+        window_id_(0),
+        fake_user_manager_(new user_manager::FakeUserManager),
+        user_manager_enabler_(fake_user_manager_) {}
   ~MultiUserNotificationBlockerChromeOSTest() override {}
 
   // ash::test::AshTestBase overrides:
@@ -128,6 +132,10 @@ class MultiUserNotificationBlockerChromeOSTest
   TestingProfileManager testing_profile_manager_;
   int window_id_;
 
+  user_manager::FakeUserManager* fake_user_manager_;  // Not owned.
+
+  chromeos::ScopedUserManagerEnabler user_manager_enabler_;
+
   DISALLOW_COPY_AND_ASSIGN(MultiUserNotificationBlockerChromeOSTest);
 };