Loading the Launcher with a Locked Profile launched UserManager.

chrome/browser/ui/webui/signin/user_manager_screen_handler.cc

Index: chrome/browser/ui/webui/signin/user_manager_screen_handler.cc
diff --git a/chrome/browser/ui/webui/signin/user_manager_screen_handler.cc b/chrome/browser/ui/webui/signin/user_manager_screen_handler.cc
index 7dc3575dcc8b0f4a946d61232958f7a7ee844055..6ad8b25e1cf7037d6efd3689e1239c5813eb8388 100644
--- a/chrome/browser/ui/webui/signin/user_manager_screen_handler.cc
+++ b/chrome/browser/ui/webui/signin/user_manager_screen_handler.cc
@@ -21,6 +21,7 @@
 #include "chrome/browser/profiles/profile_window.h"
 #include "chrome/browser/profiles/profiles_state.h"
 #include "chrome/browser/signin/local_auth.h"
+#include "chrome/browser/ui/app_list/app_list_service.h"
 #include "chrome/browser/ui/browser_commands.h"
 #include "chrome/browser/ui/browser_dialogs.h"
 #include "chrome/browser/ui/browser_finder.h"
@@ -148,6 +149,11 @@ bool IsAddPersonEnabled() {
   return service->GetBoolean(prefs::kBrowserAddPersonEnabled);
 }
 
+void ShowAppList(Browser* browser, chrome::HostDesktopType desktop_type) {
+  AppListService* app_list_service = AppListService::Get(desktop_type);
+  app_list_service->ShowForProfile(browser->profile());
+}
+
 }  // namespace
 
 // ProfileUpdateObserver ------------------------------------------------------
@@ -730,6 +736,9 @@ void UserManagerScreenHandler::OnBrowserWindowReady(Browser* browser) {
   } else if (url_hash_ == profiles::kUserManagerSelectProfileChromeMemory) {
     base::MessageLoop::current()->PostTask(
         FROM_HERE, base::Bind(&chrome::ShowMemory, browser));
+  } else if (url_hash_ == profiles::kUserManagerSelectProfileAppLauncher) {
+     base::MessageLoop::current()->PostTask(
+         FROM_HERE, base::Bind(&ShowAppList, browser, desktop_type_));
   }
 
   // This call is last as it deletes this object.