Use category flush for focus events.

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 94 matching lines @@
     window.setTimeout(move.bind(this, this.node_), 0);
   }
 };
 
 /**
  * @param {Element} input
  * @constructor
  * @implements {ISearchHandler}
  */
 ISearchUI = function(input) {
-  /** @type {ChromeVoxState} */
+  /** @type {ChromeVoxState} @private */
   this.background_ =
       chrome.extension.getBackgroundPage()['ChromeVoxState']['instance'];
   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);
 
@@ skipping 71 matching lines @@
    */
   onSearchResultChanged: function(node) {
     this.output_(node);
   },
 
   /**
    * @param {!AutomationNode} node
    * @private
    */
   output_: function(node) {
-    Output.flushNextSpeechUtterance();
+    Output.forceModeForNextSpeechUtterance(cvox.QueueMode.FLUSH);
     var o = new Output().withRichSpeechAndBraille(
         cursors.Range.fromNode(node), null, Output.EventType.NAVIGATE).go();
 
     this.background_.setCurrentRange(cursors.Range.fromNode(node));
   },
 
   /** Unregisters event handlers. */
   destroy: function() {
     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