[Merge to M55] Fix regression showing chrome logo in SAML signin title bar

chrome/browser/resources/chromeos/login/screen_gaia_signin.css

 /* Copyright (c) 2012 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file. */
 
 #gaia-signin {
   height: 528px;
   width: 448px;
 }
 
 #gaia-signin.full-width {
@@ skipping 13 matching lines @@
   outline-color: rgb(77, 144, 254);
 }
 
 #gaia-signin-form-container,
 #signin-frame {
   height: 100%;
   position: relative;
   width: 100%;
 }
 
-.gaia-signin #step-logo {
-  display: none;
-}
-
 #signin-frame {
   display: block;
   opacity: 0;
   overflow: hidden;
   transition: opacity 500ms ease-in;
 }
 
 #signin-frame.show {
   opacity: 1;
   transition: opacity 500ms ease-out;
@@ skipping 56 matching lines @@
   right: 0;
   top: 0;
   z-index: 1;
 }
 
 .loading #gaia-navigation,
 .full-width #gaia-navigation {
   color: rgba(0, 0, 0, .54);
 }