Update gn_version to 468c6128db7fabe32a29d4753460ef53594406fc

https://gn.googlesource.com/gn.git/+log/feafd1012a32..468c6128db7f

Change-Id: I47584a5a0749575079f1e24c1286398fb1b794f4
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/127010
Reviewed-by: Thomas Sepez <tsepez@google.com>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
diff --git a/DEPS b/DEPS
index 4d46f6e..5b01825 100644
--- a/DEPS
+++ b/DEPS
@@ -122,7 +122,7 @@
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling GN CIPD package version
   # and whatever else without interference from each other.
-  'gn_version': 'git_revision:feafd1012a32c05ec6095f69ddc3850afb621f3a',
+  'gn_version': 'git_revision:468c6128db7fabe32a29d4753460ef53594406fc',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling goldctl CIPD package version
   # and whatever else without interference from each other.