Use ICU script code "Jpan" instead of "Hrkt" in Japanese pref names

chrome/common/extensions/api/experimental_font_settings.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": "experimental.fontSettings",
     "types": [
       {
         "id": "FontName",
         "type": "object",
         "description": "Represents a font name.",
         "properties": {
           "fontName": {
             "type": "string",
             "description": "The font name."
           },
           "localizedName": {
             "type": "string",
             "description": "The font name localized for the current locale."
           }
         }
       },
       {
         "id": "ScriptCode",
         "type": "string",
         "enum": [ "Arab", "Armn", "Beng", "Cans", "Cher", "Cyrl", "Deva", "Ethi", "Geor",
-                  "Grek", "Gujr", "Guru", "Hang", "Hans", "Hant", "Hebr", "Hrkt", "Knda",
+                  "Grek", "Gujr", "Guru", "Hans", "Hant", "Hebr", "Jpan", "Knda", "Kore",
                   "Khmr", "Laoo", "Mlym", "Mong", "Mymr", "Orya", "Sinh", "Taml", "Telu",
                   "Thaa", "Thai", "Tibt", "Yiii", "Zyyy"
                 ],
         "description": "An ISO 15924 script code. The default, or global, script is represented by script code \"Zyyy\"."
       },
       {
         "id": "GenericFamily",
         "type": "string",
         "enum": ["standard", "sansserif", "serif", "fixed", "cursive", "fantasy"],
         "description": "A CSS generic font family."
@@ skipping 527 matching lines @@
                 "$ref": "LevelOfControl",
                 "description": "The level of control this extension has over the setting."
               }
             }
           }
         ]
       }
     ]
   }
 ]