Loading the Launcher with a Locked Profile launched UserManager.

chrome/browser/ui/ash/app_list/app_list_service_ash.cc

Index: chrome/browser/ui/ash/app_list/app_list_service_ash.cc
diff --git a/chrome/browser/ui/ash/app_list/app_list_service_ash.cc b/chrome/browser/ui/ash/app_list/app_list_service_ash.cc
index 0034b574d10ae45e732524a4cb80657a676a0ca6..8ae9ccd5ec09521af9c953a8d3a4c63351079802 100644
--- a/chrome/browser/ui/ash/app_list/app_list_service_ash.cc
+++ b/chrome/browser/ui/ash/app_list/app_list_service_ash.cc
@@ -122,7 +122,8 @@ AppListService* AppListService::Get(chrome::HostDesktopType desktop_type) {
 }
 
 // static
-void AppListService::InitAll(Profile* initial_profile) {
+void AppListService::InitAll(Profile* initial_profile,
+                             const base::FilePath& profile_path) {
   AppListServiceAsh::GetInstance()->Init(initial_profile);
 }