Build ZIP archiver in ui/file_manager.

ui/file_manager/zip_archiver/BUILD.gn

+# Copyright 2017 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/features.gni")
+
+copy("zip_archiver") {
+  pexe_dir = get_label_info(
+      "//ui/file_manager/zip_archiver/zip_archiver/cpp:zip_archiver_pnacl(//build/toolchain/nacl:newlib_pnacl)",
+      "root_out_dir")
+
+  sources = [
+    "$pexe_dir/zip_archiver_pnacl.pexe",
+  ]
+
+  outputs = [
+    "$root_gen_dir/ui/file_manager/{{source_file_part}}.js",
+  ]
+
+  deps = [
+    "//ui/file_manager/zip_archiver/cpp:zip_archiver_pnacl(//build/toolchain/nacl:newlib_pnacl)",
+  ]
+}