Disable next compatibility mode for ChromeVox on dev channel

ui/accessibility/ax_node_data.cc

 // Copyright 2013 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.
 
 #include "ui/accessibility/ax_node_data.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <set>
@@ skipping 606 matching lines @@
     switch (string_attributes[i].first) {
       case AX_ATTR_ACCESS_KEY:
         result += " access_key=" + value;
         break;
       case AX_ATTR_ARIA_INVALID_VALUE:
         result += " aria_invalid_value=" + value;
         break;
       case AX_ATTR_AUTO_COMPLETE:
         result += " autocomplete=" + value;
         break;
+      case AX_ATTR_CHROME_CHANNEL:
+        result += " chrome_channel=" + value;
+        break;
       case AX_ATTR_DESCRIPTION:
         result += " description=" + value;
         break;
       case AX_ATTR_DISPLAY:
         result += " display=" + value;
         break;
       case AX_ATTR_FONT_FAMILY:
         result += " font-family=" + value;
         break;
       case AX_ATTR_HTML_TAG:
@@ skipping 171 matching lines @@
     }
   }
 
   if (!child_ids.empty())
     result += " child_ids=" + IntVectorToString(child_ids);
 
   return result;
 }
 
 }  // namespace ui