Improves GN's make_global_settings

build/toolchain/clang.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.
 
 declare_args() {
   use_clang_type_profiler = false
 }
 
 if (is_clang) {
   # Define "make_clang_dir" which is the directory relative to the source root
   # of the clang directory we're using. This is used for defining the header
   # for GYP so it must match the directory format of GYP (rather than using
   # GN-style "//..." paths).
   if (is_linux && use_clang_type_profiler) {
     if (cpu_arch == "x64") {
       make_clang_dir = "third_party/llvm-allocated-type/Linux_x64"
     } else {
       # 32-bit Clang is unsupported. It may not build. Put your 32-bit Clang in
       # this directory at your own risk if needed for some purpose (e.g. to
       # compare 32-bit and 64-bit behavior like memory usage). Any failure by
       # this compiler should not close the tree.
       make_clang_dir = "third_party/llvm-allocated-type/Linux_ia32"
     }
   } else {
     make_clang_dir = "third_party/llvm-build/Release+Asserts"
   }
 
+  # This includes the array values but not the 'make_global_settings' name.
   make_clang_global_settings =
-    "'make_global_settings': [" +
     "['CC', '$make_clang_dir/bin/clang']," +
     "['CXX', '$make_clang_dir/bin/clang++']," +
     "['CC.host', '\$(CC)']," +
-    "['CXX.host', '\$(CXX)']," +
-    "],"
+    "['CXX.host', '\$(CXX)'],"
 }