Give the ChromeVox Panel an extension view type.

chrome/browser/extensions/chrome_extensions_browser_client.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 "chrome/browser/extensions/chrome_extensions_browser_client.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/version.h"
@@ skipping 342 matching lines @@
       MenuItem::ExtensionKey("", embedder_process_id, view_instance_id));
 }
 
 void ChromeExtensionsBrowserClient::AttachExtensionTaskManagerTag(
     content::WebContents* web_contents,
     ViewType view_type) {
   switch (view_type) {
     case VIEW_TYPE_APP_WINDOW:
     case VIEW_TYPE_EXTENSION_BACKGROUND_PAGE:
     case VIEW_TYPE_EXTENSION_DIALOG:
+    case VIEW_TYPE_EXTENSION_OTHER:
     case VIEW_TYPE_EXTENSION_POPUP:
     case VIEW_TYPE_LAUNCHER_PAGE:
     case VIEW_TYPE_VIRTUAL_KEYBOARD:
       // These are the only types that are tracked by the ExtensionTag.
       task_management::WebContentsTags::CreateForExtension(web_contents,
                                                            view_type);
       return;
 
     case VIEW_TYPE_BACKGROUND_CONTENTS:
     case VIEW_TYPE_EXTENSION_GUEST:
@@ skipping 15 matching lines @@
 }
 
 scoped_refptr<update_client::UpdateClient>
 ChromeExtensionsBrowserClient::CreateUpdateClient(
     content::BrowserContext* context) {
   return update_client::UpdateClientFactory(
       make_scoped_refptr(new ChromeUpdateClientConfig(context)));
 }
 
 }  // namespace extensions