Revert Revert "Expose chrome policies using Android's App Restrictions Schema"

components/policy/BUILD.gn

Index: components/policy/BUILD.gn
diff --git a/components/policy/BUILD.gn b/components/policy/BUILD.gn
index 5e405f7acd68c937ee049082d7b888602a3868c9..d8d7c9266e6fac3a8b92c8423a57029ed5f41b35 100644
--- a/components/policy/BUILD.gn
+++ b/components/policy/BUILD.gn
@@ -47,6 +47,9 @@ if (enable_configuration_policy) {
   # build puts everything into the following directory. We do the same for now.
   policy_gen_dir = "$root_gen_dir/policy"
 
+  # Directory for generating Android App Restrictions resources
+  android_resources_gen_dir = "$policy_gen_dir/android_resources"
+
   # This protobuf is equivalent to chrome_settings.proto but shares messages
   # for policies of the same type, so that less classes have to be generated
   # and compiled.
@@ -59,6 +62,10 @@ if (enable_configuration_policy) {
   constants_header_path = "$policy_gen_dir/policy_constants.h"
   constants_source_path = "$policy_gen_dir/policy_constants.cc"
   protobuf_decoder_path = "$policy_gen_dir/cloud_policy_generated.cc"
+  app_restrictions_path =
+      "$android_resources_gen_dir/xml-v21/app_restrictions.xml"
+  app_resources_path =
+      "$android_resources_gen_dir/values-v21/restriction_values.xml"
 
   action("cloud_policy_code_generate") {
     script = "tools/generate_policy_source.py"
@@ -78,8 +85,17 @@ if (enable_configuration_policy) {
       protobuf_decoder_path,
       chrome_settings_proto_path,
       cloud_policy_proto_path,
+      app_restrictions_path,
+      app_resources_path,
     ]
 
+    if (os != "android") {
+      outputs -= [
+        app_restrictions_path,
+        app_resources_path,
+      ]
+    }
+
     args = [
       "--policy-constants-header=" +
           rebase_path(constants_header_path, root_build_dir),
@@ -91,6 +107,10 @@ if (enable_configuration_policy) {
           rebase_path(cloud_policy_proto_path, root_build_dir),
       "--cloud-policy-decoder=" +
           rebase_path(protobuf_decoder_path, root_build_dir),
+      "--app-restrictions-definition=" +
+          rebase_path(app_restrictions_path, root_build_dir),
+      "--app-restrictions-resources=" +
+          rebase_path(app_resources_path, root_build_dir),
       os,
       chromeos_flag,
       rebase_path("resources/policy_templates.json", root_build_dir),