Improves GN's make_global_settings

build/toolchain/goma.gni

 # 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.
 
 # Defines the configuration of Goma.
 #
 # This is currently designed to match the GYP build exactly, so as not to break
 # people during the transition.
 #
 # TODO(brettw) make Android work like normal Linux. It's silly that Android has
@@ skipping 24 matching lines @@
   if (is_win) {
     goma_dir = "c:\goma\goma-win"
   } else {
     goma_dir = exec_script("get_default_posix_goma_dir.py", [], "value")
   }
 }
 
 if (use_goma) {
   # Define the toolchain for the GYP build when using goma.
   make_goma_global_settings =
-    "'make_global_settings': [" +
     "['CC_wrapper', '$goma_dir/gomacc']," +
     "['CXX_wrapper', '$goma_dir/gomacc']," +
     "['CC.host_wrapper', '$goma_dir/gomacc']," +
-    "['CXX.host_wrapper', '$goma_dir/gomacc']," +
-    "],"
+    "['CXX.host_wrapper', '$goma_dir/gomacc'],"
 }