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

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

Index: chrome/browser/ui/ash/multi_user/multi_user_window_manager_chromeos_unittest.cc
diff --git a/chrome/browser/ui/ash/multi_user/multi_user_window_manager_chromeos_unittest.cc b/chrome/browser/ui/ash/multi_user/multi_user_window_manager_chromeos_unittest.cc
index badf4a535b2e1428ed168b9200ba445ded033a37..e6834781b0367656be121bf13fcbd53ef8f5b36f 100644
--- a/chrome/browser/ui/ash/multi_user/multi_user_window_manager_chromeos_unittest.cc
+++ b/chrome/browser/ui/ash/multi_user/multi_user_window_manager_chromeos_unittest.cc
@@ -18,10 +18,12 @@
 #include "base/logging.h"
 #include "base/strings/string_util.h"
 #include "base/time/time.h"
+#include "chrome/browser/chromeos/login/users/scoped_user_manager_enabler.h"
 #include "chrome/browser/ui/ash/multi_user/multi_user_window_manager.h"
 #include "chrome/browser/ui/ash/multi_user/multi_user_window_manager_chromeos.h"
 #include "chrome/browser/ui/ash/multi_user/user_switch_animator_chromeos.h"
 #include "chrome/test/base/testing_profile.h"
+#include "components/user_manager/fake_user_manager.h"
 #include "components/user_manager/user_info.h"
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/window_event_dispatcher.h"
@@ -39,7 +41,9 @@ class MultiUserWindowManagerChromeOSTest : public AshTestBase {
  public:
   MultiUserWindowManagerChromeOSTest()
       : multi_user_window_manager_(NULL),
-        session_state_delegate_(NULL) {}
+        session_state_delegate_(NULL),
+        fake_user_manager_(new user_manager::FakeUserManager),
+        user_manager_enabler_(fake_user_manager_) {}
 
   void SetUp() override;
   void TearDown() override;
@@ -158,6 +162,10 @@ class MultiUserWindowManagerChromeOSTest : public AshTestBase {
   // The session state delegate.
   ash::test::TestSessionStateDelegate* session_state_delegate_;
 
+  user_manager::FakeUserManager* fake_user_manager_;  // Not owned.
+
+  chromeos::ScopedUserManagerEnabler user_manager_enabler_;
+
   // The maximized window manager (if enabled).
   scoped_ptr<MaximizeModeWindowManager> maximize_mode_window_manager_;