More changes to support hermetic Xcode toolchain in GN.

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

Index: third_party/WebKit/Source/build/scripts/scripts.gni
diff --git a/third_party/WebKit/Source/build/scripts/scripts.gni b/third_party/WebKit/Source/build/scripts/scripts.gni
index d1c1291987f42d0465ef6ef072b191f53e31be7a..3f1a4104953ace5d7f7cd65b652c492388c5d6e3 100644
--- a/third_party/WebKit/Source/build/scripts/scripts.gni
+++ b/third_party/WebKit/Source/build/scripts/scripts.gni
@@ -2,6 +2,7 @@
 # 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
@@ -109,6 +110,12 @@ template("process_in_files") {
              "--output_dir",
              rebase_path(output_dir, root_build_dir),
            ]
+    if (is_mac && !use_system_xcode) {
+      args += [
+        "--developer_dir",
+        hermetic_xcode_path,
+      ]
+    }
     if (defined(invoker.other_args)) {
       args += invoker.other_args
     }