Hide slider if large cursor is disabled

chrome/browser/resources/settings/a11y_page/manage_a11y_page.html

 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button-light.html">
 <link rel="import" href="../controls/settings_slider.html">
 <link rel="import" href="../controls/settings_toggle_button.html">
 <link rel="import" href="../i18n_setup.html">
 <link rel="import" href="../route.html">
 <link rel="import" href="../settings_shared_css.html">
 <link rel="import" href="../settings_vars_css.html">
 
 <dom-module id="settings-manage-a11y-page">
@@ skipping 135 matching lines @@
       </div>
       <settings-toggle-button
           pref="{{prefs.settings.touchpad.enable_tap_dragging}}"
           label="$i18n{tapDraggingLabel}">
       </settings-toggle-button>
       <settings-toggle-button
           pref="{{prefs.settings.a11y.large_cursor_enabled}}"
           label="$i18n{largeMouseCursorLabel}">
       </settings-toggle-button>
       <template is="dom-if" if="[[enableAdjustableLargeCursor_]]">
-        <div class="list-item sub-item">
+        <div class="list-item sub-item"
+            hidden$="[[!prefs.settings.a11y.large_cursor_enabled.value]]">
           <div class="start">$i18n{largeMouseCursorSizeLabel}</div>
           <settings-slider
-             disabled$="[[!prefs.settings.a11y.large_cursor_enabled.value]]"
              pref="{{prefs.settings.a11y.large_cursor_dip_size}}"
              min="25" max="64" label-min="$i18n{largeMouseCursorSizeSmallLabel}"
              label-max="$i18n{largeMouseCursorSizeLargeLabel}">
           </settings-slider>
         </div>
       </template>
       <settings-toggle-button
           pref="{{prefs.settings.a11y.cursor_highlight}}"
           label="$i18n{cursorHighlightLabel}">
       </settings-toggle-button>
@@ skipping 25 matching lines @@
           $i18n{a11yWebStore}
         </div>
       </div>
       <button class="icon-external" is="paper-icon-button-light"
           aria-label="$i18n{additionalFeaturesTitle}"
           aria-describedby="moreFeaturesSecondary"></button>
     </div>
   </template>
   <script src="manage_a11y_page.js"></script>
 </dom-module>