diff --git a/DEPS b/DEPS
index 35ad5217729..c2c73f092d2 100644
--- a/DEPS
+++ b/DEPS
@@ -111,7 +111,7 @@ vars = {
   "ply_rev": "604b32590ffad5cbb82e4afef1d305512d06ae93",
   "protobuf_gn_rev": "ca669f79945418f6229e4fef89b666b2a88cbb10",
   "WebCore_rev": "bcb10901266c884e7b3740abc597ab95373ab55c",
-  "zlib_rev": "646b7f569718921d7d4b5b8e22572ff6c76f2596",
+  "zlib_rev": "14dd4c4455602c9b71a1a89b5cafd1f4030d2e3f",
 
   ### /third_party/pkg dependencies
   # 'tools/rev_sdk_deps.dart' can rev pkg dependencies to their latest; put an
diff --git a/build/config/dcheck_always_on.gni b/build/config/dcheck_always_on.gni
deleted file mode 100644
index 805c015b97a..00000000000
--- a/build/config/dcheck_always_on.gni
+++ /dev/null
@@ -1,8 +0,0 @@
-# Copyright 2016 The Chromium Authors
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-# Compatiblity with Chromium's build for zlib.
-dcheck_is_configurable = false
-dcheck_always_on = false
-enable_expensive_dchecks = false