[Extensions] Remove BaseFeatureProvider

extensions/common/api/_permission_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 permissions for extension APIs implemented
 // under src/extensions.
 // See chrome/common/extensions/api/_features.md to understand this file, as
-// well as feature.h, simple_feature.h, and base_feature_provider.h.
+// 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:
 // chrome/test/data/extensions/api_test/stubs_app/manifest.json
 
 {
   "alarms": {
     "channel": "stable",
     "extension_types": ["extension", "legacy_packaged_app", "platform_app"],
     "min_manifest_version": 2
   },
@@ skipping 569 matching lines @@
   }],
   "webRequest": {
     "channel": "stable",
     "extension_types": ["extension", "legacy_packaged_app"]
    },
   "webRequestBlocking": {
     "channel": "stable",
     "extension_types": ["extension", "legacy_packaged_app"]
   }
 }