[Extensions] Use compiled feature files

extensions/shell/common/api/BUILD.gn

 # 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.
 
 import("//build/json_schema_api.gni")
+import("//tools/json_schema_compiler/json_features.gni")
 import("schemas.gni")
 
 # GYP version: extensions/shell/common/api/api.gyp:shell_api
 json_schema_api("api") {
+  sources = schema_sources
   schemas = true
   bundle = true
   bundle_name = "Shell"
 }
 
 # GYP version: extensions/shell/browser/api/api_registration.gyp:shell_api_registration
 json_schema_api("api_registration") {
+  sources = schema_sources
   impl_dir = "//extensions/shell/browser/api"
   bundle_registration = true
   bundle_name = "Shell"
 
   deps = [
     ":api",
   ]
 }
+
+json_features("shell_api_features") {
+  feature_class = "APIFeature"
+  provider_class = "ShellAPIFeatureProvider"
+  sources = [
+    "../../../common/api/_api_features.json",
+    "_api_features.json",
+  ]
+}
+
+json_features("shell_permission_features") {
+  feature_class = "PermissionFeature"
+  provider_class = "ShellPermissionFeatureProvider"
+  sources = [
+    "../../../common/api/_permission_features.json",
+  ]
+}
+
+json_features("shell_manifest_features") {
+  feature_class = "ManifestFeature"
+  provider_class = "ShellManifestFeatureProvider"
+  sources = [
+    "../../../common/api/_manifest_features.json",
+  ]
+}
+
+json_features("shell_behavior_features") {
+  feature_class = "BehaviorFeature"
+  provider_class = "ShellBehaviorFeatureProvider"
+  sources = [
+    "../../../common/api/_behavior_features.json",
+  ]
+}
+
+group("extensions_features") {
+  public_deps = [
+    ":shell_api_features",
+    ":shell_behavior_features",
+    ":shell_manifest_features",
+    ":shell_permission_features",
+  ]
+}