DO NOT SUBMIT, Uglify print preview resources, WIP.

chrome/browser/resources/vulcanize.gni

Index: chrome/browser/resources/vulcanize.gni
diff --git a/chrome/browser/resources/vulcanize.gni b/chrome/browser/resources/vulcanize.gni
index 69db5294cc8fa73b74f5f1ad3bb0a197ffcf512c..ca9bd1efba5ee2ea07face64810db2ab91d608d4 100644
--- a/chrome/browser/resources/vulcanize.gni
+++ b/chrome/browser/resources/vulcanize.gni
@@ -74,6 +74,34 @@ template("vulcanize") {
   }
 }
 
+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"