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+<!--
+@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-behaviors/iron-button-state.html">
+<link rel="import" href="../iron-behaviors/iron-control-state.html">
+
+<!--
+`PaperItemBehavior` is a convenience behavior shared by <paper-item> and
+<paper-icon-item> that manages the shared control states and attributes of
+the items.
+-->
+
+<script>
+  /** @polymerBehavior Polymer.PaperItemBehavior */
+  Polymer.PaperItemBehaviorImpl = {
+    hostAttributes: {
+      role: 'option',
+      tabindex: '0'
+    }
+  };
+
+  /** @polymerBehavior */
+  Polymer.PaperItemBehavior = [
+    Polymer.IronButtonState,
+    Polymer.IronControlState,
+    Polymer.PaperItemBehaviorImpl
+  ];
+</script>