Make all ComplexFeatures of single feature to be SimpleFeature.

chrome/common/extensions/api/_permission_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 permissions for extension APIs implemented
 // under src/chrome.
 // See chrome/common/extensions/api/_features.md to understand this file, as
 // well as feature.h, simple_feature.h, and feature_provider.h.
 
 // If you add a new platform_app permission please update the "stubs_app" test:
@@ skipping 368 matching lines @@
     "extension_types": ["extension"],
     "whitelist": [
       "2FC374607C2DF285634B67C64A2E356C607091C3",  // Quickoffice
       "3727DD3E564B6055387425027AD74C58784ACC15",  // Quickoffice internal
       "12E618C3C6E97495AAECF2AC12DEB082353241C6",  // QO component extension
       "D5736E4B5CF695CB93A2FB57E4FDC6E5AFAB6FE2",  // http://crbug.com/312900
       "D57DE394F36DC1C3220E7604C575D29C51A6C495",  // http://crbug.com/319444
       "3F65507A3B39259B38C8173C6FFA3D12DF64CCE9"   // http://crbug.com/371562
     ]
   }],
-  "fileSystem.requestFileSystem": [{
+  "fileSystem.requestFileSystem": {
     "channel": "stable",
     "extension_types": ["platform_app"],
     "platforms": ["chromeos"]
-  }],
+  },
   "fileSystemProvider": [{
     "channel": "stable",
     "extension_types": ["extension", "platform_app"],
     "platforms": ["chromeos"]
   }, {
     "channel": "stable",
     "extension_types": ["legacy_packaged_app"],
     "platforms": ["chromeos"],
     "whitelist": [
       "0EA6B717932AD64C469C1CCB6911457733295907",  // http://crbug.com/673004
@@ skipping 319 matching lines @@
       "BCC85C0D7F85897F2699974421EA402144C35C0C", // API Test
       // TODO (ntang) Remove the following 2 hashes by 12/31/2017.
       "B620CF4203315F9F2E046EDED22C7571A935958D", // http://crbug.com/510270
       "B206D8716769728278D2D300349C6CB7D7DE2EF9", // http://crbug.com/510270
       "2B6C6A4A5940017146F3E58B7F90116206E84685",  // http://crbug.com/642141
       "B6C2EFAB3EC3BF6EF03701408B6B09A67B2D0069",  // http://crbug.com/642141
       "96FF2FFA5C9173C76D47184B3E86D267B37781DE",  // http://crbug.com/642141
       "0136FCB13DB29FD5CD442F56E59E53B61F1DF96F"   // http://crbug.com/642141
     ]
   },
-  "inlineInstallPrivate":[{
+  "inlineInstallPrivate": {
     "channel": "dev",
     "extension_types": ["platform_app"],
     "whitelist": [
       "8076E9E4DA0DF53B33BFAF0454D3C3B898F93273", // Test Extension
       "3A78E13285C1949EF84AA85E3BF65D1E83A3D9AB", // Test Extension
       "4477F0B4FE934D0A8C88922C0986DA7B25D881E1"  // API Test
     ]
-  }],
+  },
   "resourcesPrivate": {
     "channel": "stable",
     "extension_types": [
       "extension", "legacy_packaged_app", "platform_app"
     ],
     "location": "component"
   },
   "rtcPrivate": {
     "channel": "stable",
     "extension_types": ["extension", "legacy_packaged_app"],
@@ skipping 161 matching lines @@
     "channel": "stable",
     "extension_types": ["platform_app"],
     "platforms": ["chromeos"],
     "whitelist": [
       "A948368FC53BE437A55FEB414106E207925482F5",  // Files app
       "8C726564C6DBE7380BAB388DE6CC7EC93EB44B06",  // Video player
       "5065C83E84321221675D20FBE4DC43C655CC8C6F"   // Files app tests
     ]
   }
 }