MD Settings: Bluetooth: Move device list to subpage

chrome/browser/resources/settings/settings_page/settings_subpage.js

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @fileoverview
  * 'settings-subpage' shows a subpage beneath a subheader. The header contains
  * the subpage title, a search field and a back icon.
  */
 
@@ skipping 11 matching lines @@
 
     /** Setting a |searchLabel| will enable search. */
     searchLabel: String,
 
     searchTerm: {
       type: String,
       notify: true,
       value: '',
     },
 
+    /** If true shows an active spinner at the end of the subpage header. */
+    showSpinner: {
+      type: Boolean,
+      value: false,
+    },
+
     /**
      * Indicates which element triggers this subpage. Used by the searching
      * algorithm to show search bubbles. It is |null| for subpages that are
      * skipped during searching.
      * @type {?HTMLElement}
      */
     associatedControl: {
       type: Object,
       value: null,
     },
   },
 
   /** @private */
   onTapBack_: function() {
     settings.navigateToPreviousRoute();
   },
 
   /** @private */
   onSearchChanged_: function(e) {
     this.searchTerm = e.detail;
   },
 });