Add public_deps support to the GN repack template

tools/grit/repack.gni

 # 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.
 
 declare_args() {
   # Absolute path to a resource whitelist (generated using
   # //tools/resources/find_used_resources.py).
   repack_whitelist = ""
 }
 
 # This file defines a template to invoke grit repack in a consistent manner.
 #
 # Parameters:
 #   sources  [required]
 #       List of pak files that need to be combined.
 #
 #   output  [required]
 #       File name (single string) of the output file.
 #
 #   deps  [optional]
+#   public_deps  [optional]
 #   visibility  [optional]
 #       Normal meaning.
 template("repack") {
   action(target_name) {
     forward_variables_from(invoker,
                            [
                              "deps",
+                             "public_deps",
                              "testonly",
                              "visibility",
                            ])
     assert(defined(invoker.sources), "Need sources for $target_name")
     assert(defined(invoker.output), "Need output for $target_name")
 
     script = "//tools/grit/grit/format/repack.py"
 
     inputs = invoker.sources
     outputs = [
@@ skipping 63 matching lines @@
       outputs = [
         invoker.bundle_output,
       ]
     } else {
       outputs = [
         "{{bundle_resources_dir}}/{{source_file_part}}",
       ]
     }
   }
 }