Roll third_party/zlib/ 814da1f38..b9b9a5af7 (10 commits)

https://chromium.googlesource.com/chromium/src/third_party/zlib.git/+log/814da1f383b6..b9b9a5af7cca

Created with:
  roll-dep third_party/zlib

Change-Id: I1cc7cc19c4e53211e5d8a9749678210a22a0a4be
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/66250
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Hui Yingst <nigi@chromium.org>
diff --git a/DEPS b/DEPS
index cad08d5..217ac7f 100644
--- a/DEPS
+++ b/DEPS
@@ -33,7 +33,7 @@
   'trace_event_revision': '81c050f857a0e3c960cfd87f37e3d30d2ef78718',
   'v8_revision': 'cd34145326def51cb6dcf87aed7d0caf9f62bb4f',
   'yasm_source_revision': '720b70524a4424b15fc57e82263568c8ba0496ad',
-  'zlib_revision': '814da1f383b625955149c3845db62af3f29a4ffe',
+  'zlib_revision': 'b9b9a5af7cca2e683e5f2aead8418e5bf9d5a7d5',
 }
 
 deps = {