Convert ARRAYSIZE_UNSAFE -> arraysize in components/.

components/variations/metrics_util_unittest.cc

Index: components/variations/metrics_util_unittest.cc
diff --git a/components/variations/metrics_util_unittest.cc b/components/variations/metrics_util_unittest.cc
index 4f324947176ec79b7830c9423abae991ea408476..46f50caca4f5e7f6653a755f2093cb29e726e8d3 100644
--- a/components/variations/metrics_util_unittest.cc
+++ b/components/variations/metrics_util_unittest.cc
@@ -24,7 +24,7 @@ TEST(MetricsUtilTest, HashName) {
     {"0123456789ABCDEF", 348858318U}
   };
 
-  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(known_hashes); ++i)
+  for (size_t i = 0; i < arraysize(known_hashes); ++i)
     EXPECT_EQ(known_hashes[i].hash_value, HashName(known_hashes[i].name));
 }