diff -up chromium-75.0.3770.80/third_party/zlib/zconf.h.nozmangle chromium-75.0.3770.80/third_party/zlib/zconf.h
--- chromium-75.0.3770.80/third_party/zlib/zconf.h.nozmangle	2019-06-05 11:12:30.420412467 -0400
+++ chromium-75.0.3770.80/third_party/zlib/zconf.h	2019-06-05 11:17:43.512683058 -0400
@@ -8,10 +8,6 @@
 #ifndef ZCONF_H
 #define ZCONF_H
 
-/* This include does prefixing as below, but with an updated set of names.  Also
- * sets up export macros in component builds. */
-#include "chromeconf.h"
-
 /*
  * If you *really* need a unique prefix for all types and library functions,
  * compile with -DZ_PREFIX. The "standard" zlib should be compiled without it.