MD User Manager: Removes external style sheets in Polymer components

chrome/browser/resources/md_user_manager/user_manager_pages.html

 <link rel="import" href="chrome://md-user-manager/create_profile.html">
 <link rel="import" href="chrome://md-user-manager/supervised_user_create_confirm.html">
 <link rel="import" href="chrome://md-user-manager/supervised_user_learn_more.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/neon-animation/animations/slide-from-left-animation.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/neon-animation/animations/slide-right-animation.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/neon-animation/neon-animated-pages.html">
 
 <dom-module id="user-manager-pages">
-  <link rel="import" type="css"
-      href="chrome://md-user-manager/user_manager_pages.css">
   <template>
+    <style>
+      neon-animated-pages {
+        height: 100%;
+      }
+
+      neon-animated-pages > div {
+        display: flex;
+        justify-content: center;
+      }
+    </style>
     <neon-animated-pages id="animatedPages" attr-for-selected="id"
         selected="[[selectedPage_]]" entry-animation="slide-from-left-animation"
         exit-animation="slide-right-animation">
       <div id="create-user-page">
         <template is="dom-if"
             if="[[isPageVisible_(selectedPage_, 'create-user-page')]]" restamp>
           <create-profile></create-profile>
         </template>
       </div>
       <div id="user-pods-page">
@@ skipping 14 matching lines @@
             if="[[isPageVisible_(selectedPage_, 'supervised-create-confirm-page')]]">
           <supervised-user-create-confirm profile-info="[[pageData_]]">
           </supervised-user-create-confirm>
         </template>
       </div>
       <content></content>
     </neon-animated-pages>
   </template>
   <script src="chrome://md-user-manager/user_manager_pages.js"></script>
 </dom-module>