Revert of Make ChromeVox Next a setting in options page.

chrome/browser/resources/chromeos/chromevox/cvox2/background/i_search.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 Objects related to incremental search.
  */
 
 goog.provide('ISearch');
 goog.provide('ISearchHandler');
@@ skipping 96 matching lines @@
 };
 
 /**
  * @param {Element} input
  * @constructor
  * @implements {ISearchHandler}
  */
 ISearchUI = function(input) {
   /** @type {ChromeVoxState} */
   this.background_ =
-      chrome.extension.getBackgroundPage()['ChromeVoxState']['instance'];
+      chrome.extension.getBackgroundPage()['global']['backgroundObj'];
   this.iSearch_ = new ISearch(this.background_.currentRange.start.node);
   this.input_ = input;
   this.dir_ = Dir.FORWARD;
   this.iSearch_.handler = this;
 
   this.onKeyDown = this.onKeyDown.bind(this);
   this.onTextInput = this.onTextInput.bind(this);
 
   this.background_['startExcursion']();
   input.addEventListener('keydown', this.onKeyDown, true);
@@ skipping 88 matching lines @@
     this.iSearch_.handler_ = null;
     this.iSearch_ = null;
     var input = this.input_;
     this.input_ = null;
     input.removeEventListener('keydown', this.onKeyDown, true);
     input.removeEventListener('textInput', this.onTextInput, true);
   }
 };
 
 });  // goog.scope