Move AppRestriction to Policy code out of //chrome

components/policy/android/BUILD.gn

 # Copyright 2015 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/config/android/rules.gni")
 
+_jni_sources = [ "java/src/org/chromium/policy/PolicyConverter.java" ]
+
 # GYP: //components/components.gyp:policy_java
 android_library("policy_java") {
   deps = [
     "//base:base_java",
   ]
-  java_files = [ "java/src/org/chromium/policy/AppRestrictionsProvider.java" ]
+  java_files = [ "java/src/org/chromium/policy/AppRestrictionsProvider.java" ] +
+               _jni_sources
 }
+
+# GYP: //components/components.gyp:policy_jni_headers
+generate_jni("jni_headers") {
+  visibility = [ "//components/policy/*" ]
+  sources = _jni_sources
+  jni_package = "policy"
+}