Roll third_party/zlib/ dde5ce526..2aafd9d33 (6 commits)

https://chromium.googlesource.com/chromium/src/third_party/zlib.git/+log/dde5ce526c84..2aafd9d335e4

Created with:
  roll-dep third_party/zlib

TBR=tsepez@chromium.org

Change-Id: I06e4531c54e464bd934c9b0e59c250a5421c7960
Reviewed-on: https://pdfium-review.googlesource.com/c/47751
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
diff --git a/DEPS b/DEPS
index e6ae3a7..ae3c565 100644
--- a/DEPS
+++ b/DEPS
@@ -35,7 +35,7 @@
   'trace_event_revision': '211b3ed9d0481b4caddbee1322321b86a483ca1f',
   'v8_revision': 'd5f263024407cc8363474f5770362caaf3d66c87',
   'yasm_source_revision': '720b70524a4424b15fc57e82263568c8ba0496ad',
-  'zlib_revision': 'dde5ce526c84143fb931a5191dd4623ae6d197d6',
+  'zlib_revision': '2aafd9d335e4fd6fa0c74892252280a1bb51ce6f',
 }
 
 deps = {