Use the upstream version of libwebp, v0.4.3.

third_party/libwebp/webp/types.h

+// Copyright 2010 Google Inc. All Rights Reserved.
+//
+// Use of this source code is governed by a BSD-style license
+// that can be found in the COPYING file in the root of the source
+// tree. An additional intellectual property rights grant can be found
+// in the file PATENTS. All contributing project authors may
+// be found in the AUTHORS file in the root of the source tree.
+// -----------------------------------------------------------------------------
+//
+//  Common types
+//
+// Author: Skal (pascal.massimino@gmail.com)
+
+#ifndef WEBP_WEBP_TYPES_H_
+#define WEBP_WEBP_TYPES_H_
+
+#include <stddef.h>  // for size_t
+
+#ifndef _MSC_VER
+#include <inttypes.h>
+#if defined(__cplusplus) || !defined(__STRICT_ANSI__) || \
+    (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L)
+#define WEBP_INLINE inline
+#else
+#define WEBP_INLINE
+#endif
+#else
+typedef signed   char int8_t;
+typedef unsigned char uint8_t;
+typedef signed   short int16_t;
+typedef unsigned short uint16_t;
+typedef signed   int int32_t;
+typedef unsigned int uint32_t;
+typedef unsigned long long int uint64_t;
+typedef long long int int64_t;
+#define WEBP_INLINE __forceinline
+#endif  /* _MSC_VER */
+
+#ifndef WEBP_EXTERN
+// This explicitly marks library functions and allows for changing the
+// signature for e.g., Windows DLL builds.
+#define WEBP_EXTERN(type) extern type
+#endif  /* WEBP_EXTERN */
+
+// Macro to check ABI compatibility (same major revision number)
+#define WEBP_ABI_IS_INCOMPATIBLE(a, b) (((a) >> 8) != ((b) >> 8))
+
+#endif  /* WEBP_WEBP_TYPES_H_ */