[Mac/GN] Add verify_order step for the Framework.

chrome/tools/build/mac/run_verify_order.py

Index: chrome/tools/build/mac/run_verify_order.py
diff --git a/build/config/mac/xcrun.py b/chrome/tools/build/mac/run_verify_order.py
similarity index 55%
copy from build/config/mac/xcrun.py
copy to chrome/tools/build/mac/run_verify_order.py
index e2a775e51588bc58aea832544c35e2ef18cd5061..70802464393177ecbc8aa1c50b0768d3c062208d 100644
--- a/build/config/mac/xcrun.py
+++ b/chrome/tools/build/mac/run_verify_order.py
@@ -3,18 +3,25 @@
 # found in the LICENSE file.
 
 import argparse
-import os
-import subprocess
+import os.path
 import sys
+import subprocess
+
+# Wraps chrome/tools/build/mac/verify_order for the GN build so that it can
+# write a stamp file, rather than operate as a postbuild.
 
 if __name__ == '__main__':
   parser = argparse.ArgumentParser(
-      description='A script to execute a command via xcrun.')
+      description='A wrapper around verify_order that writes a stamp file.')
   parser.add_argument('--stamp', action='store', type=str,
-      help='Write a stamp file to this path on success.')
+      help='Touch this stamp file on success.')
+
   args, unknown_args = parser.parse_known_args()
 
-  rv = subprocess.check_call(['xcrun'] + unknown_args)
+  this_script_dir = os.path.dirname(sys.argv[0])
+  rv = subprocess.check_call(
+      [ os.path.join(this_script_dir, 'verify_order') ] + unknown_args)
+
   if rv == 0 and args.stamp:
     if os.path.exists(args.stamp):
       os.unlink(args.stamp)