Update gn_version to e3978de3e8dafb50a2b11efa784e08699a43faf8

Change-Id: Ifd4d49898bb136ecbf3fdc2e01fddb973d96c62e
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/108334
Reviewed-by: K. Moon <kmoon@chromium.org>
Auto-Submit: Nigi <nigi@chromium.org>
Commit-Queue: Nigi <nigi@chromium.org>
diff --git a/DEPS b/DEPS
index 22ada80..e73cc10 100644
--- a/DEPS
+++ b/DEPS
@@ -78,7 +78,7 @@
   # 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:5a004f9427a050c6c393c07ddb85cba8ff3849fa',
+  'gn_version': 'git_revision:e3978de3e8dafb50a2b11efa784e08699a43faf8',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling gtest
   # and whatever else without interference from each other.