ChromeOS cryptohome should be able to use gaia id as user identifier.

chrome/browser/ui/startup/startup_browser_creator.cc

Index: chrome/browser/ui/startup/startup_browser_creator.cc
diff --git a/chrome/browser/ui/startup/startup_browser_creator.cc b/chrome/browser/ui/startup/startup_browser_creator.cc
index d8b21e373beda1d3ab05db5f3a7c39fc3028cbe1..2b4db4d8bfa0046b9961ec0fb74d676edf625a9a 100644
--- a/chrome/browser/ui/startup/startup_browser_creator.cc
+++ b/chrome/browser/ui/startup/startup_browser_creator.cc
@@ -672,6 +672,9 @@ bool StartupBrowserCreator::ProcessCmdLineImpl(
   // If we are a demo app session and we crashed, there is no safe recovery
   // possible. We should instead cleanly exit and go back to the OOBE screen,
   // where we will launch again after the timeout has expired.
+  //
+  // TODO (alemate): kLoginUser value is no longer user e-mail. Make this check
+  // more correct.
   if (chromeos::DemoAppLauncher::IsDemoAppSession(
       command_line.GetSwitchValueASCII(chromeos::switches::kLoginUser))) {
     chrome::AttemptUserExit();