Add a treeChange type to Automation

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 243 matching lines @@
   },
   popUpButton: {
     msgId: 'role_button',
   },
   radioButton: {
     msgId: 'role_radio'
   },
   radioGroup: {
     msgId: 'role_radiogroup',
   },
-  region: {
-    msgId: 'role_region',
-    inherits: 'abstractContainer'
-  },
   rowHeader: {
     msgId: 'role_rowheader',
     inherits: 'abstractContainer'
   },
   scrollBar: {
     msgId: 'role_scrollbar',
   },
   search: {
     msgId: 'role_search',
     inherits: 'abstractContainer'
@@ skipping 192 matching lines @@
       speak: '$if($checked, @describe_radio_selected($name), ' +
           '@describe_radio_unselected($name)) $description'
     },
     radioGroup: {
       enter: '$name $role $description'
     },
     rootWebArea: {
       enter: '$name',
       speak: '$if($name, $name, $docUrl)'
     },
+    region: {
+      speak: '$descendants'
+    },
     row: {
       enter: '@row_granularity $tableRowIndex'
     },
     slider: {
       speak: '$earcon(SLIDER) @describe_slider($value, $name) $description'
     },
     staticText: {
       speak: '$name='
     },
     tab: {
@@ skipping 1019 matching lines @@
             elem.end);
       });
       spansToRemove.forEach(result.removeSpan.bind(result));
       separator = Output.SPACE;
     });
     return result;
   }
 };
 
 });  // goog.scope