[Extensions] Convert APIs to use movable types [4]

chrome/common/extensions/api/echo_private.json

 // 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": "echoPrivate",
     "compiler_options": {
-      "implemented_in": "chrome/browser/chromeos/extensions/echo_private_api.h"
+      "implemented_in": "chrome/browser/chromeos/extensions/echo_private_api.h",
+      "use_movable_types": true
     },
     "description": "none",
     "functions": [
       {
         "name": "setOfferInfo",
         "description": "Sets the offer info in Local State.",
         "type": "function",
         "parameters": [
           {
             "name": "id",
@@ skipping 103 matching lines @@
                 "type": "boolean",
                 "description": "Whether the user consent was given."
               }
             ]
           }
         ]
       }
     ]
   }
 ]