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

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

Index: chrome/browser/resources/settings/people_page/user_list.html
diff --git a/chrome/browser/resources/settings/people_page/user_list.html b/chrome/browser/resources/settings/people_page/user_list.html
index 3303a46501ce14526beb7f08872191c237ca7ef9..47176d4e32b3474eed11e02e42f62b7bd78c39b2 100644
--- a/chrome/browser/resources/settings/people_page/user_list.html
+++ b/chrome/browser/resources/settings/people_page/user_list.html
@@ -1,14 +1,14 @@
 <link rel="import" href="chrome://resources/cr_elements/icons.html">
 <link rel="import" href="chrome://resources/html/i18n_behavior.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
-<link rel="import" href="chrome://resources/polymer/v1_0/iron-flex-layout/iron-flex-layout.html">
+<link rel="import" href="chrome://resources/polymer/v1_0/iron-flex-layout/iron-flex-layout-classes.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button.html">
 <link rel="import" href="../route.html">
 <link rel="import" href="../settings_shared_css.html">
 
 <dom-module id="settings-user-list">
   <template>
-    <style include="settings-shared">
+    <style include="settings-shared iron-flex">
       .user-list {
         /* 4 users (the extra 1px is to account for the border-bottom) */
         max-height: calc(4 * (var(--settings-row-two-line-min-height) + 1px));