[Mac/GN] Build content_shell and content_shell_framework.

build/config/mac/xcrun.py

Index: build/config/mac/xcrun.py
diff --git a/build/config/mac/xcrun.py b/build/config/mac/xcrun.py
new file mode 100644
index 0000000000000000000000000000000000000000..e2a775e51588bc58aea832544c35e2ef18cd5061
--- /dev/null
+++ b/build/config/mac/xcrun.py
@@ -0,0 +1,23 @@
+# Copyright 2016 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 argparse
+import os
+import subprocess
+import sys
+
+if __name__ == '__main__':
+  parser = argparse.ArgumentParser(
+      description='A script to execute a command via xcrun.')
+  parser.add_argument('--stamp', action='store', type=str,
+      help='Write a stamp file to this path on success.')
+  args, unknown_args = parser.parse_known_args()
+
+  rv = subprocess.check_call(['xcrun'] + unknown_args)
+  if rv == 0 and args.stamp:
+    if os.path.exists(args.stamp):
+      os.unlink(args.stamp)
+    open(args.stamp, 'w+').close()
+
+  sys.exit(rv)