Convert ARRAYSIZE_UNSAFE -> arraysize in components/.

components/metrics/metrics_hashes_unittest.cc

Index: components/metrics/metrics_hashes_unittest.cc
diff --git a/components/metrics/metrics_hashes_unittest.cc b/components/metrics/metrics_hashes_unittest.cc
index ce803d1696d39ac60d6028c42e29ea01c66bf41f..b949058d64bc9b46a38e74ae0db59a6067831266 100644
--- a/components/metrics/metrics_hashes_unittest.cc
+++ b/components/metrics/metrics_hashes_unittest.cc
@@ -21,7 +21,7 @@ TEST(MetricsUtilTest, HashMetricName) {
     {"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);