ProfileManager doesn't depend on "--login-profile" switch.

chrome/browser/chromeos/login/session/user_session_manager.cc

Index: chrome/browser/chromeos/login/session/user_session_manager.cc
diff --git a/chrome/browser/chromeos/login/session/user_session_manager.cc b/chrome/browser/chromeos/login/session/user_session_manager.cc
index 9146fe4813134ec3a66c1dff9e4adff727d260e4..f261b818f712288a9ad2195b193234bf3c94171f 100644
--- a/chrome/browser/chromeos/login/session/user_session_manager.cc
+++ b/chrome/browser/chromeos/login/session/user_session_manager.cc
@@ -604,7 +604,7 @@ void UserSessionManager::PrepareProfile() {
   // TODO(nkostylev): Figure out whether demo session is using the right profile
   // path or not. See https://codereview.chromium.org/171423009
   g_browser_process->profile_manager()->CreateProfileAsync(
-      ProfileHelper::GetUserProfileDirByUserId(user_context_.GetUserID()),
+      ProfileHelper::GetProfilePathByUserIdHash(user_context_.GetUserIDHash()),
       base::Bind(&UserSessionManager::OnProfileCreated,
                  AsWeakPtr(),
                  user_context_,