More changes to support hermetic Xcode toolchain in GN.

third_party/WebKit/Source/build/scripts/scripts.gni

 # 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("//build/toolchain/toolchain.gni")
 import("//third_party/WebKit/Source/config.gni")
 
 # All paths in this file should be absolute so targets in any directory can use
 # them without worrying about the current directory.
 _scripts_dir = "//third_party/WebKit/Source/build/scripts"
 
 scripts_for_in_files = [
   # jinja2/__init__.py contains version string, so sufficient as
   # dependency for whole jinja2 package
   "//third_party/jinja2/__init__.py",
@@ skipping 87 matching lines @@
     }
     outputs = invoker.outputs
 
     # Extract the directory to write files to.
     output_dir = get_path_info(outputs[0], "dir")
 
     args = rebase_path(invoker.in_files, root_build_dir) + [
              "--output_dir",
              rebase_path(output_dir, root_build_dir),
            ]
+    if (!use_system_xcode) {

[Nico, 2016/10/10 19:35:59]

is_mac check?

[erikchen, 2016/10/10 22:54:57]

Done.

+      args += [
+        "--developer_dir",
+        hermetic_xcode_path,
+      ]
+    }
     if (defined(invoker.other_args)) {
       args += invoker.other_args
     }
 
     if (defined(invoker.deps)) {
       deps = invoker.deps
     } else {
       deps = make_core_generated_deps
     }
     forward_variables_from(invoker, [ "visibility" ])
@@ skipping 65 matching lines @@
     other_inputs = make_event_factory_files
     forward_variables_from(invoker,
                            [
                              "deps",
                              "in_files",
                              "outputs",
                              "visibility",
                            ])
   }
 }