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

third_party/polymer/v0_8/components/paper-item/paper-item-body.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
 -->
 
 <link rel="import" href="../polymer/polymer.html">
 <link rel="import" href="../paper-styles/paper-styles.html">
 
 <!--
+Use `<paper-item-body>` in a `<paper-item>` or `<paper-icon-item>` to make two- or
+three- line items. It is a flex item that is a vertical flexbox.
 
-@element paper-item-body
+    <paper-item>
+      <paper-item-body two-line>
+        <div>Show your status</div>
+        <div secondary>Your status is visible to everyone</div>
+      </paper-item-body>
+    </paper-item>
+
+The child elements with the `secondary` attribute is given secondary text styling.
+
+### Styling
+
+The following custom properties and mixins are available for styling:
+
+Custom property | Description | Default
+----------------|-------------|----------
+`--paper-item-body-two-line-min-height`   | Minimum height of a two-line item          | `72px`
+`--paper-item-body-three-line-min-height` | Minimum height of a three-line item        | `88px`
+`--paper-item-body-secondary-color`       | Foreground color for the `secondary` area  | `--secondary-text-color`
+`--paper-item-body-secondary`             | Mixin applied to the `secondary` area      | `{}`
+
 -->
 
 <dom-module id="paper-item-body">
 
   <style>
 
     :host {
-      --mixin(--layout-vertical);
-      --mixin(--layout-center-justified);
-      --mixin(--layout-flex);
+      overflow: hidden; /* needed for text-overflow: ellipsis to work on ff */
+      @apply(--layout-vertical);
+      @apply(--layout-center-justified);
+      @apply(--layout-flex);
     }
 
     :host([two-line]) {
-      min-height: 72px;
+      min-height: var(--paper-item-body-two-line-min-height, 72px);
     }
 
     :host([three-line]) {
-      min-height: 88px;
+      min-height: var(--paper-item-body-three-line-min-height, 88px);
     }
 
     :host > ::content > * {
       white-space: nowrap;
       overflow: hidden;
       text-overflow: ellipsis;
     }
 
     :host > ::content [secondary] {
-      color: var(--secondary-text-color);
-      mixin(--paper-font-body1);
+      color: var(--paper-item-body-secondary-color, --secondary-text-color);
+      @apply(--paper-font-body1);
 
-      mixin(--paper-item-body-secondary);
+      @apply(--paper-item-body-secondary);
     }
 
 
   </style>
 
   <template>
     <content></content>
   </template>
 
 </dom-module>
 
 <script>
 
 (function() {
 
   Polymer({
 
-    is: 'paper-item-body',
-
-    enableCustomStyleProperties: true
+    is: 'paper-item-body'
 
   });
 
 })();
 
 </script>