Fix Chrome logo to transition smoothly between the demo login screen and login spinner.

chrome/browser/resources/chromeos/login/demo_user_login.js

Index: chrome/browser/resources/chromeos/login/demo_user_login.js
diff --git a/chrome/browser/resources/chromeos/login/demo_user_login.js b/chrome/browser/resources/chromeos/login/demo_user_login.js
index 269bd7e86e487be1646e2fbfcf91eed0a3462c4b..22ce5448a9dd400bab08181ee2b7fa94be072707 100644
--- a/chrome/browser/resources/chromeos/login/demo_user_login.js
+++ b/chrome/browser/resources/chromeos/login/demo_user_login.js
@@ -38,12 +38,8 @@ showLoginSpinner = function() {
   // We're already logging in - don't login on click.
   document.removeEventListener('click', onClick);
 
-  // Hide the "Click to start" assets.
-  $('logo').hidden = true;
+  // Hide the "Click to start" and show the spinner.
   $('demo-login-text').hidden = true;
-
-  // Show the "Logging in" assets.
-  $('logo-login').hidden = false;
   $('login-spinner').hidden = false;
 };