[OTS] Integrate WOFF 2.0 algorithm into OTS

include/opentype-sanitiser.h

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef OPENTYPE_SANITISER_H_
 #define OPENTYPE_SANITISER_H_
 
 #if defined(_WIN32)
 #include <stdlib.h>
 typedef signed char int8_t;
@@ skipping 173 matching lines @@
 //     partial output may have been written.
 //   input: the OpenType file
 //   length: the size, in bytes, of |input|
 // -----------------------------------------------------------------------------
 bool Process(OTSStream *output, const uint8_t *input, size_t length);
 
 // Force to disable debug output even when the library is compiled with
 // -DOTS_DEBUG.
 void DisableDebugOutput();
 
+// Enable WOFF2 support(experimental).
+void EnableWOFF2();
+
 }  // namespace ots
 
 #endif  // OPENTYPE_SANITISER_H_