DO NOT SUBMIT, Uglify print preview resources, WIP.

chrome/browser/resources/vulcanize.gni

 # 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.
 
 template("node") {
   action(target_name) {
     forward_variables_from(invoker, "*")
 
     # Declare dependencies to all involved tools.
     inputs += [
@@ skipping 56 matching lines @@
 
     if (defined(invoker.insert_in_head)) {
       args += [
         "--insert_in_head",
         invoker.insert_in_head,
       ]
     }
   }
 }
 
+template("uglify") {
+  node(target_name) {
+    script = "//chrome/browser/resources/uglify_gn.py"
+
+    # Input and outputs files must be in the same order.
+    inputs = []
+
+    #foreach(_input, invoker.input_files) {
+    #  inputs += [ "$target_gen_dir/$_input" ]
+    #}
+    outputs = [
+      "$target_gen_dir/${invoker.output_file}",
+    ]
+
+    args = [
+             "--base_folder",
+             invoker.base_folder,
+             "--out_folder",
+             rebase_path(target_gen_dir, root_build_dir),
+             "--input_files",
+           ] + invoker.input_files +
+           [
+             "--output_file",
+             invoker.output_file,
+           ]
+  }
+}
+
 template("polymer_css_build") {
   node(target_name) {
     script = "//chrome/browser/resources/polymer_css_build_gn.py"
 
     # Input and outputs files must be in the same order.
     inputs = []
     foreach(_input, invoker.input_files) {
       inputs += [ "$target_gen_dir/$_input" ]
     }
 
@@ skipping 27 matching lines @@
     deps = invoker.deps
 
     args = [
       "--out_folder",
       rebase_path("$target_gen_dir/${invoker.out_folder}", root_build_dir),
       "--pak_file",
       rebase_path("$target_gen_dir/${invoker.pak_file}", root_build_dir),
     ]
   }
 }