kiosk: Add kiosk.required_platform_version manifest key

extensions/common/api/_manifest_features.json

 // Copyright 2014 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.
 
 // This features file defines manifest keys implemented under src/extensions.
 // See extensions/common/features/* to understand this file, in particular
 // feature.h, simple_feature.h, and base_feature_provider.h.
 
 // To add a new whitelisted ID, SHA-1 it and force it to uppercase. In Bash:
 //
@@ skipping 270 matching lines @@
   "offline_enabled": {
     "channel": "stable",
     "extension_types": [
       "extension", "legacy_packaged_app", "hosted_app", "platform_app"
     ]
   },
   "options_ui": {
     "channel": "stable",
     "extension_types": ["extension", "legacy_packaged_app"]
   },
+  "required_platform_version": {

[asargent_no_longer_on_chrome, 2016/01/19 22:11:00]

I don't think this is a feature we'd ever consider launching for non-kiosk mode,
so I think it would make sense to somehow indicate in the name of this manifest
property that this is kiosk-specific. Ideally that might look something like the
following in a manifest.json file:

{
  "name": "My Kiosk App",
  "version": "2",
  "manifest_version": 2,
  "kiosk_enabled": true,
  "kiosk_only": true,
  "kiosk": {
    "required_platform_version": "1.2.3.4"
  }
}


You can declare that in this file by doing:

"kiosk.required_platform_version" : {
  ...
}



(See app.background, background.persistent, etc. for examples)

[xiyuan, 2016/01/19 23:40:52]

Done.

+    "channel": "stable",

[asargent_no_longer_on_chrome, 2016/01/19 22:11:00]

Please set channel to canary or dev until you have launch approval

[xiyuan, 2016/01/19 23:40:52]

Done.

+    "extension_types": ["platform_app"]
+  },
   "sandbox": {
     "channel": "stable",
     "extension_types": [
       "extension", "platform_app", "legacy_packaged_app"
     ],
     "min_manifest_version": 2
   },
   "sockets": {
     "channel": "stable",
     "extension_types": ["platform_app"]
@@ skipping 22 matching lines @@
       "extension_types": ["platform_app"],
       "location": "component"
     }
   ],
   "webview": {
     "channel": "stable",
     "extension_types": ["platform_app"],
     "min_manifest_version": 2
   }
 }