[Extensions] Fix platforms for privacy.websites.protectedContentEnabled

chrome/common/extensions/api/privacy.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": "privacy",
     "description": "Use the <code>chrome.privacy</code> API to control usage of the features in Chrome that can affect a user's privacy. This API relies on the <a href='types#ChromeSetting'>ChromeSetting prototype of the type API</a> for getting and setting Chrome's configuration.",
     "types": [
       {
@@ skipping 102 matching lines @@
           },
           "referrersEnabled": {
             "$ref": "types.ChromeSetting",
             "value": ["referrersEnabled", {"type":"boolean"}],
             "description": "If enabled, Chrome sends <code>referer</code> headers with your requests. Yes, the name of this preference doesn't match the misspelled header. No, we're not going to change it. The value of this preference is of type boolean, and the default value is <code>true</code>."
           },
           "protectedContentEnabled": {
             "$ref": "types.ChromeSetting",
             "value": ["protectedContentEnabled", {"type":"boolean"}],
             "description": "<strong>Available on Windows and ChromeOS only</strong>: If enabled, Chrome provides a unique ID to plugins in order to run protected content. The value of this preference is of type boolean, and the default value is <code>true</code>.",
-            "platforms": ["windows", "cros", "cros touch"]
+            "platforms": ["win", "chromeos"]
           }
         }
       }
     }
   }
 ]