IWYU: Include all headers for symbols used in files.

Semi-automatically taking the the misc-include-cleaner warnings
by clang-tidy and fixing files to be self-contained.

Change-Id: Iaaa2b2ec9d6dcce547fa5cb6b4f056dfc8c781ff

src/webp/decode.h

@@ -14,6 +14,8 @@
 #ifndef WEBP_WEBP_DECODE_H_
 #define WEBP_WEBP_DECODE_H_
 
+#include <stddef.h>
+
 #include "./types.h"
 
 #ifdef __cplusplus

src/webp/demux.h

@@ -48,6 +48,8 @@
 #ifndef WEBP_WEBP_DEMUX_H_
 #define WEBP_WEBP_DEMUX_H_
 
+#include <stddef.h>
+
 #include "./decode.h"     // for WEBP_CSP_MODE
 #include "./mux_types.h"
 #include "./types.h"

src/webp/encode.h

@@ -14,6 +14,8 @@
 #ifndef WEBP_WEBP_ENCODE_H_
 #define WEBP_WEBP_ENCODE_H_
 
+#include <stddef.h>
+
 #include "./types.h"
 
 #ifdef __cplusplus

src/webp/mux_types.h

@@ -15,6 +15,7 @@
 #define WEBP_WEBP_MUX_TYPES_H_
 
 #include <string.h>  // memset()
+
 #include "./types.h"
 
 #ifdef __cplusplus

src/webp/types.h

@@ -14,10 +14,10 @@
 #ifndef WEBP_WEBP_TYPES_H_
 #define WEBP_WEBP_TYPES_H_
 
-#include <stddef.h>  // for size_t
+#include <stddef.h>  // IWYU pragma: export for size_t
 
 #ifndef _MSC_VER
-#include <inttypes.h>
+#include <inttypes.h>  // IWYU pragma: export
 #if defined(__cplusplus) || !defined(__STRICT_ANSI__) || \
     (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L)
 #define WEBP_INLINE inline