Rename "managed (mode|user)" to "supervised user" (part 8)

chrome/browser/resources/options/managed_user_learn_more.css

-/* Copyright 2013 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. */
-
-#managed-user-learn-more {
-  width: 722px;
-}
-
-#managed-user-learn-more-title {
-  padding: 20px;
-}
-
-#managed-user-learn-more-text {
-  padding: 0 20px 0 20px;
-  white-space: pre-wrap;
-  word-wrap: break-word;
-}
-
-@media only screen and (max-height:500px) {
-
-/* Omit the image on very small screens. */
-#managed-user-learn-more-image {
-  display: none;
-}
-
-} /* @media only screen and (max-height:500px) */
-
-#managed-user-learn-more-image {
-  -webkit-border-radius: 3px 3px 0 0;
-  -webkit-box-flex: 1;
-  background-image: -webkit-image-set(
-      url('../../../../ui/resources/default_100_percent/supervised_illustration_start.png') 1x,
-      url('../../../../ui/resources/default_200_percent/supervised_illustration_start.png') 2x);
-  background-position: center;
-  height: 344px;
-}
-
-#managed-user-learn-more-action-area {
-  padding: 20px;
-}