Require commas between items in a GN list.

skia/BUILD.gn

 # Copyright (c) 2013 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("//build/config/features.gni")
 import("//build/config/ui.gni")
 if (cpu_arch == "arm") {
   import("//build/config/arm.gni")
 }
 
 skia_support_gpu = !is_ios
 skia_support_pdf = !is_ios && enable_printing != 0
 
 # The list of Skia files is kept in skia_gn_files.gypi. Read it.
 gypi_values = exec_script(
     "//build/gypi_to_gn.py",
     [ rebase_path("skia_gn_files.gypi"),
       "--replace=<(skia_include_path)=//third_party/skia/include",
-      "--replace=<(skia_src_path)=//third_party/skia/src" ]
+      "--replace=<(skia_src_path)=//third_party/skia/src" ],
     "scope",
     [ "skia_gn_files.gypi" ])
 
 # External-facing config for dependent code.
 config("skia_config") {
   include_dirs = [
     "config",
     "ext",
     "//third_party/skia/include/config",
     "//third_party/skia/include/core",
@@ skipping 359 matching lines @@
     ":skia_config",
     "//build/config/compiler:no_chromium_code"
   ]
 
   deps = [
     "//base",
   ]
 
   visibility = ":skia"
 }