Beginning work on GN build

third_party/zlib/contrib/minizip/mztools.h

Index: third_party/zlib/contrib/minizip/mztools.h
diff --git a/third_party/zlib/contrib/minizip/mztools.h b/third_party/zlib/contrib/minizip/mztools.h
new file mode 100644
index 0000000000000000000000000000000000000000..90c834d3ab5e9a8acf89a93b93edf3fcbeeac5c7
--- /dev/null
+++ b/third_party/zlib/contrib/minizip/mztools.h
@@ -0,0 +1,31 @@
+/*
+  Additional tools for Minizip
+  Code: Xavier Roche '2004
+  License: Same as ZLIB (www.gzip.org)
+*/
+
+#ifndef _zip_tools_H
+#define _zip_tools_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef _ZLIB_H
+#include "third_party/zlib/zlib.h"
+#endif
+
+#include "unzip.h"
+
+/* Repair a ZIP file (missing central directory)
+   file: file to recover
+   fileOut: output file after recovery
+   fileOutTmp: temporary file name used for recovery
+*/
+extern int ZEXPORT unzRepair(const char* file,
+                             const char* fileOut,
+                             const char* fileOutTmp,
+                             uLong* nRecovered,
+                             uLong* bytesRecovered);
+
+#endif