Use gn_helpers to [se]serialize GN lists.

build/android/gyp/generate_resource_rewriter.py

 #!/usr/bin/env python
 #
 # Copyright (c) 2015 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.
 
 """Generate ResourceRewriter.java which overwrites the given package's
    resource id.
 """
 
@@ skipping 77 matching lines @@
                       temp_dir)
 
 
 def main():
   options = ParseArgs(build_utils.ExpandFileArgs(sys.argv[1:]))
   package = options.package_name
   if options.output_dir:
     output_dir = os.path.join(options.output_dir, *package.split('.'))
     CreateResourceRewriter(
         package,
-        build_utils.ParseGypList(options.dep_packages),
+        build_utils.ParseGnList(options.dep_packages),
         output_dir)
   else:
     CreateResourceRewriterSrcjar(
         package,
-        build_utils.ParseGypList(options.dep_packages),
+        build_utils.ParseGnList(options.dep_packages),
         options.srcjar)
 
   return 0
 
 if __name__ == '__main__':
   sys.exit(main())