Roll //build, //native_client, and a few more targets of opportunity.

mojo/dart/embedder/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.
 
 # embedder specific template rules.
 import("embedder.gni")
 
 source_set("dart_controller_no_snapshot") {
   sources = [
     "$target_gen_dir/dart_embedder_patch_resources.cc",
@@ skipping 342 matching lines @@
            rebase_path("$gen_snapshot_dir/gen_snapshot"),
            "--package_root",
            rebase_path("$root_gen_dir/dart-gen"),
            "--script",
            rebase_path("snapshot.dart"),
            "--vm_output_bin",
            rebase_path(vm_isolate_snapshot, root_build_dir),
            "--output_bin",
            rebase_path(isolate_snapshot, root_build_dir),
            "--target_os",
-           os,
+           current_os,
            "--url_mapping=dart:mojo.builtin,$builtin_path",
            "--url_mapping=dart:mojo.internal,$internal_path",
            "--url_mapping=dart:mojo.io,$io_path",
 
            # Embedder packages
            "--url_mapping=dart:embedder_private_packages,$embedder_packages_path",
            "--url_mapping=dart:_mojo/public/dart/application.dart,$embedder_package_application_path",
            "--url_mapping=dart:_mojo/public/dart/bindings.dart,$embedder_package_bindings_path",
            "--url_mapping=dart:_mojo/public/dart/core.dart,$embedder_package_core_path",
          ] + embedder_mojom_url_mappings
@@ skipping 19 matching lines @@
     "--vm_input_bin",
     rebase_path("$target_gen_dir/vm_isolate_snapshot.bin"),
     "--input_bin",
     rebase_path("$target_gen_dir/isolate_snapshot.bin"),
     "--input_cc",
     rebase_path("//mojo/dart/embedder/snapshot.cc.tmpl"),
     "--output",
     rebase_path(output),
   ]
 }