Upgrade to 1.0 and switch clients to dom-repeat where needed.

third_party/polymer/v0_8/components/paper-item/paper-item.html

 <!--
-    @license
-    Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
-    This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
-    The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
-    The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
-    Code distributed by Google as part of the polymer project is also
-    subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+@license
+Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
 -->
 
 <link rel="import" href="../polymer/polymer.html">
+<link rel="import" href="../iron-flex-layout/iron-flex-layout.html">
 <link rel="import" href="../paper-styles/paper-styles.html">
 
 <!--
-`paper-item` is a non-interactive list item.
+`<paper-item>` is a non-interactive list item. By default, it is a horizontal flexbox.
 
+    <paper-item>Item</paper-item>
+
+Use this element with `<paper-item-body>` to make Material Design styled two-line and three-line
+items.
+
+    <paper-item>
+      <paper-item-body two-line>
+        <div>Show your status</div>
+        <div secondary>Your status is visible to everyone</div>
+      </paper-item-body>
+      <iron-icon icon="warning"></iron-icon>
+    </paper-item>
+
+### Styling
+
+The following custom properties and mixins are available for styling:
+
+Custom property | Description | Default
+----------------|-------------|----------
+`--paper-item-min-height` | Minimum height of the item | `48px`
+`--paper-item`            | Mixin applied to the item  | `{}`
+
+### Accessibility
+
+This element has `role="listitem"` by default. Depending on usage, it may be more appropriate to set
+`role="menuitem"`, `role="menuitemcheckbox"` or `role="menuitemradio"`.
+
+    <paper-item role="menuitemcheckbox">
+      <paper-item-body>
+        Show your status
+      </paper-item-body>
+      <paper-checkbox></paper-checkbox>
+    </paper-item>
+
+@group Paper Elements
 @element paper-item
+@demo demo/index.html
 -->
 
 <dom-module id="paper-item">
 
   <link rel="import" type="css" href="paper-item-shared.css">
 
   <style>
 
     :host {
-      mixin(--layout-horizontal);
-      mixin(--layout-center);
-      mixin(--paper-font-subhead);
+      @apply(--layout-horizontal);
+      @apply(--layout-center);
+      @apply(--paper-font-subhead);
 
-      mixin(--paper-item);
+      @apply(--paper-item);
     }
 
   </style>
 
   <template>
     <content></content>
   </template>
 
 </dom-module>
 
 <script>
 
 (function() {
 
   Polymer({
 
     is: 'paper-item',
 
-    enableCustomStyleProperties: true,
-
     hostAttributes: {
       role: 'listitem'
     }
 
   });
 
 })();
 
 </script>