Revert "Rename experimental.accessibility to accessibilityPrivate"

chrome/common/extensions/api/experimental_accessibility.json

-// Copyright 2014 The Chromium Authors. All rights reserved.
+// Copyright (c) 2012 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.
 
 [
   {
-    "namespace": "accessibilityPrivate",
+    "namespace": "experimental.accessibility",
     "compiler_options": {
       "implemented_in": "chrome/browser/accessibility/accessibility_extension_api.h"
     },
     "description": "none",
     "types": [
       {
         "id": "CheckboxDetails",
         "type": "object",
         "description": "Information about the state of a checkbox.",
         "properties": {
@@ skipping 310 matching lines @@
           {
             "type": "boolean",
             "name": "makeAnnouncements",
             "description": "Whether to make introductory announcements."
           }
         ]
       }
     ]
   }
 ]