Completely detach removed nodes.

chrome/browser/resources/chromeos/chromevox/cvox2/background/output.js

 // Copyright 2014 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 Provides output services for ChromeVox.
  */
 
 goog.provide('Output');
 goog.provide('Output.EventType');
@@ skipping 895 matching lines @@
   /**
    * Renders the given range using optional context previous range and event
    * type.
    * @param {!cursors.Range} range
    * @param {cursors.Range} prevRange
    * @param {EventType|Output.EventType} type
    * @param {!Array<Spannable>} buff Buffer to receive rendered output.
    * @private
    */
   render_: function(range, prevRange, type, buff) {
+    if (prevRange && !prevRange.isValid())
+      prevRange = null;
+
     if (range.isSubNode())
       this.subNode_(range, prevRange, type, buff);
     else
       this.range_(range, prevRange, type, buff);
   },
 
   /**
    * Format the node given the format specifier.
    * @param {AutomationNode} node
    * @param {string|!Object} format The output format either specified as an
@@ skipping 646 matching lines @@
           break;
         }
         earconFinder = earconFinder.parent;
       }
     }
     return null;
   }
 };
 
 });  // goog.scope