Roll third_party/zlib/ 156be8c52..1b274918e (14 commits)

https://chromium.googlesource.com/chromium/src/third_party/zlib.git/+log/156be8c52f80..1b274918e40f

Created with:
  roll-dep third_party/zlib

Change-Id: Ib5cea0f55d13b0ae4f467e2d5b619234392904cf
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/69002
Auto-Submit: K Moon <kmoon@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
diff --git a/DEPS b/DEPS
index 0d30af0..08f22ec 100644
--- a/DEPS
+++ b/DEPS
@@ -103,7 +103,7 @@
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling zlib
   # and whatever else without interference from each other.
-  'zlib_revision': '156be8c52f80cde343088b4a69a80579101b6e67',
+  'zlib_revision': '1b274918e40f45b80d39173919e1ef5550dc40a6',
 }
 
 deps = {