Settings: Fix alignment of secondary user warning

BUG=731038
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Review-Url: https://codereview.chromium.org/2944213002
Cr-Commit-Position: refs/heads/master@{#480844}

chrome/browser/resources/settings/basic_page/basic_page.html

@@ -54,8 +54,10 @@
 
       #secondaryUserBanner {
         @apply(--shadow-elevation-2dp);
+        align-items: center;
         background-color: white;
         border-radius: 2px;
+        display: flex;
         margin: 21px 0;
       }
 
@@ -96,8 +98,7 @@
           </settings-reset-profile-banner>
         </template>
 <if expr="chromeos">
-        <div id="secondaryUserBanner" class="layout horizontal center"
-            hidden="[[!showSecondaryUserBanner_]]">
+        <div id="secondaryUserBanner" hidden="[[!showSecondaryUserBanner_]]">
           <div id="secondaryUserIcon"></div>
           <div class="flex">$i18n{secondaryUserBannerText}</div>
         </div>