Convert ARRAYSIZE_UNSAFE -> arraysize in components/.

components/metrics/metrics_hashes_unittest.cc

 // Copyright 2014 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 "components/metrics/metrics_hashes.h"
 
 #include "base/format_macros.h"
 #include "base/strings/stringprintf.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace metrics {
 
 // Make sure our ID hashes are the same as what we see on the server side.
 TEST(MetricsUtilTest, HashMetricName) {
   static const struct {
     std::string input;
     std::string output;
   } cases[] = {
     {"Back", "0x0557fa923dcee4d0"},
     {"Forward", "0x67d2f6740a8eaebf"},
     {"NewTab", "0x290eb683f96572f1"},
   };
 
-  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(cases); ++i) {
+  for (size_t i = 0; i < arraysize(cases); ++i) {
     uint64 hash = HashMetricName(cases[i].input);
     std::string hash_hex = base::StringPrintf("0x%016" PRIx64, hash);
     EXPECT_EQ(cases[i].output, hash_hex);
   }
 }
 
 }  // namespace metrics