Revert "MD Settings: Improve rendering performance of fonts page."

chrome/browser/resources/settings/controls/settings_dropdown_menu.html

 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-dropdown-menu/paper-dropdown-menu.html">
-<link rel="import" href="chrome://resources/polymer/v1_0/paper-item/paper-item-shared-styles.html">
+<link rel="import" href="chrome://resources/polymer/v1_0/paper-item/paper-item.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-listbox/paper-listbox.html">
 <link rel="import" href="/controls/pref_control_behavior.html">
 <link rel="import" href="/i18n_setup.html">
 <link rel="import" href="/prefs/pref_util.html">
 <link rel="import" href="/settings_shared_css.html">
 
 <dom-module id="settings-dropdown-menu">
   <template>
-    <style include="settings-shared paper-item-shared-styles">
-      .paper-item {
+    <style include="settings-shared">
+      paper-item {
         color: var(--paper-grey-800);
         font-size: inherit;
       }
 
       paper-dropdown-menu {
         --iron-icon-fill-color: var(--paper-grey-600);
         --paper-font-subhead: {
           font-size: inherit;
         };
         --paper-input-container-underline: {
           background: var(--paper-grey-300);
         };
         width: 160px;
       }
      </style>
     <paper-dropdown-menu id="dropdownMenu" label="[[menuLabel_]]"
         on-iron-select="onSelect_" no-label-float$="[[noLabelFloat]]"
         disabled="[[shouldDisableMenu_(disabled, menuOptions.*)]]">
       <paper-listbox class="dropdown-content" selected="{{selected_}}"
           attr-for-selected="data-value">
-        <template is="dom-repeat" items="[[menuOptions]]" item-count="5">
-          <button class="paper-item" data-value$="[[item.value]]" role="option">
-            [[item.name]]
-          </button>
+        <template is="dom-repeat" items="[[menuOptions]]">
+          <paper-item data-value$="[[item.value]]">[[item.name]]</paper-item>
         </template>
-        <button class="paper-item" data-value$="[[notFoundValue_]]"
-            role="option" hidden$="[[!isSelectedNotFound_(selected_)]]">
+        <paper-item data-value$="[[notFoundValue_]]"
+            hidden$="[[!isSelectedNotFound_(selected_)]]">
           $i18n{custom}
-        </button>
+        </paper-item>
       </paper-listbox>
     </paper-dropdown-menu>
   </template>
   <script src="settings_dropdown_menu.js"></script>
 </dom-module>