Convert GN visibility to lists.

Source/bindings/scripts/BUILD.gn

 # 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.
 
 import("//third_party/WebKit/Source/bindings/bindings.gni")
 import("//third_party/WebKit/Source/bindings/scripts/scripts.gni")
 import("//third_party/WebKit/Source/bindings/templates/templates.gni")
 
-visibility = "//third_party/WebKit/*"
+visibility = [ "//third_party/WebKit/*" ]
 
 # This separate pre-caching step is required to use lex/parse table
 # caching in PLY, since PLY itself does not check if the cache is
 # valid, and thus may end up using a stale cache if this step hasn't
 # been run to update it.
 #
 # This action's dependencies *is* the cache validation.
 #
 # GYP version: scripts.gyp:cached_lex_yacc_tables
 action("cached_lex_yacc_tables") {
@@ skipping 20 matching lines @@
     code_generator_template_files
   # Dummy file to track dependency.
   stamp_file = "$bindings_scripts_output_dir/cached_jinja_templates.stamp"
   outputs = [ stamp_file ]
 
   args = [
     rebase_path(bindings_scripts_output_dir, root_build_dir),
     rebase_path(stamp_file, root_build_dir),
   ]
 }