MD Settings: Remove usage of deprecated iron-flex-layout.html, for CrOS.

chrome/browser/resources/settings/people_page/users_page.html

Index: chrome/browser/resources/settings/people_page/users_page.html
diff --git a/chrome/browser/resources/settings/people_page/users_page.html b/chrome/browser/resources/settings/people_page/users_page.html
index 318d936e1f20e77f91608e55be2e298a65cf4db5..f9edb06215a2d85f7736436e33e176deca6f9051 100644
--- a/chrome/browser/resources/settings/people_page/users_page.html
+++ b/chrome/browser/resources/settings/people_page/users_page.html
@@ -1,7 +1,6 @@
 <link rel="import" href="chrome://resources/html/action_link.html">
 <link rel="import" href="chrome://resources/html/action_link_css.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
-<link rel="import" href="chrome://resources/polymer/v1_0/iron-flex-layout/classes/iron-flex-layout.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-button/paper-button.html">
 <link rel="import" href="../controls/settings_toggle_button.html">
 <link rel="import" href="../settings_shared_css.html">
@@ -19,6 +18,10 @@
         /* Add user button must be lined up with the start of users' names. */
         -webkit-margin-start: var(--settings-box-row-indent);
       }
+
+      .block {
+        display: block;
+      }
     </style>
     <template is="dom-if" if="[[isWhitelistManaged_]]">
       <div class="settings-box">$i18n{settingsManagedLabel}</div>