Update gn_version to 53ef169800760fdc09f0773bf380fe99eaeab339

https://gn.googlesource.com/gn/+log/0cbe341c1a28..53ef16980076

Change-Id: I2f4394d788d0b7b06c80f8407024c76ffaef8939
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/93276
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
diff --git a/DEPS b/DEPS
index 3096c83..1386730 100644
--- a/DEPS
+++ b/DEPS
@@ -73,7 +73,7 @@
   # 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:0cbe341c1a28037ee32d21b589030a7df0b9fdab',
+  'gn_version': 'git_revision:53ef169800760fdc09f0773bf380fe99eaeab339',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling gtest
   # and whatever else without interference from each other.