Whitelist fileSystemProvider API to Secure Shell app

chrome/common/extensions/api/_manifest_features.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.
 
 // This features file defines manifest keys implemented under src/chrome.
 // See chrome/common/extensions/api/_features.md to understand this file, as
 // well as feature.h, simple_feature.h, and base_feature_provider.h.
 
 {
   "about_page": {
@@ skipping 127 matching lines @@
     {
       "channel": "stable",
       "extension_types": ["extension", "legacy_packaged_app"]
     },
     {
       "channel": "stable",
       "extension_types": ["platform_app"],
       "location": "component"
     }
   ],
-  "file_system_provider_capabilities": {
+  "file_system_provider_capabilities": [{
     "channel": "stable",
     "extension_types": ["extension", "platform_app"]
-  },
+  }, {
+    "channel": "stable",
+    "extension_types": ["legacy_packaged_app"],
+    "platforms": ["chromeos"],
+    "whitelist": [
+      "0EA6B717932AD64C469C1CCB6911457733295907",  // http://crbug.com/673004
+      "58B0C2968C335964D5433E89CA4D86628A0E3D4B"   // http://crbug.com/673004
+    ]
+  }],
   "homepage_url": {
     "channel": "stable",
     "extension_types": ["extension", "legacy_packaged_app"]
   },
   "import": {
     "channel": "stable",
     "extension_types": "all"
   },
   "input_components": {
     "channel": "stable",
@@ skipping 85 matching lines @@
   },
   "update_url": {
     "channel": "stable",
     "extension_types": "all"
   },
   "url_handlers": {
     "channel": "stable",
     "extension_types": ["platform_app"]
   }
 }