Loading the Launcher with a Locked Profile launched UserManager.

chrome/browser/ui/app_list/profile_loader.cc

Index: chrome/browser/ui/app_list/profile_loader.cc
diff --git a/chrome/browser/ui/app_list/profile_loader.cc b/chrome/browser/ui/app_list/profile_loader.cc
index 40546f7c53a9b8a16e2e54e0121ffd0f58dd59fc..ec8d9a4e4103d1c7b1245cadd7d168a92cbd2ecf 100644
--- a/chrome/browser/ui/app_list/profile_loader.cc
+++ b/chrome/browser/ui/app_list/profile_loader.cc
@@ -8,6 +8,7 @@
 #include "base/files/file_path.h"
 #include "chrome/browser/apps/scoped_keep_alive.h"
 #include "chrome/browser/ui/app_list/profile_store.h"
+#include "chrome/browser/ui/user_manager.h"
 
 ProfileLoader::ProfileLoader(ProfileStore* profile_store)
     : profile_store_(profile_store),
@@ -32,6 +33,13 @@ void ProfileLoader::LoadProfileInvalidatingOtherLoads(
     base::Callback<void(Profile*)> callback) {
   InvalidatePendingProfileLoads();
 
+  if (profile_store_->IsProfileLocked(profile_file_path)) {
+      UserManager::Show(base::FilePath(),
+                        profiles::USER_MANAGER_NO_TUTORIAL,
+                        profiles::USER_MANAGER_SELECT_PROFILE_APP_LAUNCHER);
+      return;
+  }
+
   Profile* profile = profile_store_->GetProfileByPath(profile_file_path);
   if (profile) {
     callback.Run(profile);