Use size_t as the type of key_length and digest_length arguments of HMAC.

crypto/hmac_unittest.cc

 // 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.
 
 #include <string>
 
 #include "crypto/hmac.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 static const size_t kSHA1DigestSize = 20;
 static const size_t kSHA256DigestSize = 32;
 
 static const char* kSimpleKey =
     "\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA"
     "\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA"
     "\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA"
     "\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA"
     "\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA";
-static const int kSimpleKeyLength = 80;
+static const size_t kSimpleKeyLength = 80;
 
 static const struct {
   const char *data;
   const int data_len;
   const char *digest;
 } kSimpleHmacCases[] = {
   { "Test Using Larger Than Block-Size Key - Hash Key First", 54,
     "\xAA\x4A\xE5\xE1\x52\x72\xD0\x0E\x95\x70\x56\x37\xCE\x8A\x3B\x55"
         "\xED\x40\x21\x12" },
   { "Test Using Larger Than Block-Size Key and Larger "
@@ skipping 238 matching lines @@
         base::StringPiece(kSimpleHmacCases[i].data,
                           kSimpleHmacCases[i].data_len)));
 
     // Expected size, mismatched data
     EXPECT_FALSE(hmac.Verify(
         base::StringPiece(kSimpleHmacCases[i].data,
                           kSimpleHmacCases[i].data_len),
         base::StringPiece(empty_digest, kSHA1DigestSize)));
   }
 }