Cleanup: Use uint8_t type throughout in the MD5 API.

base/md5.h

 // Copyright (c) 2011 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 BASE_MD5_H_
 #define BASE_MD5_H_
 
+#include <stdint.h>
+
 #include "base/base_export.h"
 #include "base/strings/string_piece.h"
 
 namespace base {
 
 // MD5 stands for Message Digest algorithm 5.
 // MD5 is a robust hash function, designed for cyptography, but often used
 // for file checksums.  The code is complex and slow, but has few
 // collisions.
 // See Also:
@@ skipping 10 matching lines @@
 //   MD5Update(&ctx, data2, length2);
 //   ...
 //
 //   MD5Digest digest; // the result of the computation
 //   MD5Final(&digest, &ctx);
 //
 // You can call MD5DigestToBase16() to generate a string of the digest.
 
 // The output of an MD5 operation.
 struct MD5Digest {
-  unsigned char a[16];
+  uint8_t a[16];
 };
 
 // Used for storing intermediate data during an MD5 computation. Callers
 // should not access the data.
 typedef char MD5Context[88];
 
 // Computes the MD5 sum of the given data buffer with the given length.
 // The given 'digest' structure will be filled with the result data.
 BASE_EXPORT void MD5Sum(const void* data, size_t length, MD5Digest* digest);
 
@@ skipping 17 matching lines @@
 
 // Converts a digest into human-readable hexadecimal.
 BASE_EXPORT std::string MD5DigestToBase16(const MD5Digest& digest);
 
 // Returns the MD5 (in hexadecimal) of a string.
 BASE_EXPORT std::string MD5String(const StringPiece& str);
 
 }  // namespace base
 
 #endif  // BASE_MD5_H_