Disable next compatibility mode for ChromeVox on dev channel

chrome/browser/ui/aura/accessibility/ax_root_obj_wrapper.cc

 // 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.
 
 #include "chrome/browser/ui/aura/accessibility/ax_root_obj_wrapper.h"
 
 #include "base/strings/utf_string_conversions.h"
+#include "chrome/common/channel_info.h"
 #include "ui/accessibility/ax_node_data.h"
 #include "ui/accessibility/ax_node_data.h"
 #include "ui/aura/window.h"
 #include "ui/views/accessibility/ax_aura_obj_cache.h"
 #include "ui/views/accessibility/ax_window_obj_wrapper.h"
 
 AXRootObjWrapper::AXRootObjWrapper(int32_t id)
     : id_(id), alert_window_(new aura::Window(NULL)) {
   alert_window_->Init(ui::LAYER_NOT_DRAWN);
 }
@@ skipping 28 matching lines @@
 void AXRootObjWrapper::GetChildren(
     std::vector<views::AXAuraObjWrapper*>* out_children) {
   views::AXAuraObjCache::GetInstance()->GetTopLevelWindows(out_children);
   out_children->push_back(
       views::AXAuraObjCache::GetInstance()->GetOrCreate(alert_window_));
 }
 
 void AXRootObjWrapper::Serialize(ui::AXNodeData* out_node_data) {
   out_node_data->id = id_;
   out_node_data->role = ui::AX_ROLE_DESKTOP;
-  // TODO(dtseng): Apply a richer set of states.
   out_node_data->state = 0;
+  out_node_data->AddStringAttribute(ui::AX_ATTR_CHROME_CHANNEL,
+                                    chrome::GetChannelString());
 }
 
 int32_t AXRootObjWrapper::GetID() {
   return id_;
 }