Move HashMetricName to base namespace.

base/metrics/metrics_hashes.cc

Index: base/metrics/metrics_hashes.cc
diff --git a/components/metrics/metrics_hashes.cc b/base/metrics/metrics_hashes.cc
similarity index 65%
rename from components/metrics/metrics_hashes.cc
rename to base/metrics/metrics_hashes.cc
index 066e6ebb9eec63d9912eb61880b671dae407f3a8..b09ea4bde80cf43711c25f4d8be5e565e574dc73 100644
--- a/components/metrics/metrics_hashes.cc
+++ b/base/metrics/metrics_hashes.cc
@@ -2,27 +2,27 @@
 // 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/metrics/metrics_hashes.h"
 
 #include "base/logging.h"
 #include "base/md5.h"
 #include "base/sys_byteorder.h"
 
-namespace metrics {
+namespace base {
 
 namespace {
 
 // Converts the 8-byte prefix of an MD5 hash into a uint64 value.
-inline uint64 DigestToUInt64(const base::MD5Digest& digest) {
-  uint64 value;
-  DCHECK_GE(arraysize(digest.a), sizeof(value));
+inline uint64_t DigestToUInt64(const base::MD5Digest& digest) {
+  uint64_t value;
+  DCHECK_GE(sizeof(digest.a), sizeof(value));
   memcpy(&value, digest.a, sizeof(value));
-  return base::HostToNet64(value);
+  return base::NetToHost64(value);
 }
 
 }  // namespace
 
-uint64 HashMetricName(const std::string& name) {
+uint64_t HashMetricName(const std::string& name) {
   base::MD5Digest digest;
   base::MD5Sum(name.c_str(), name.size(), &digest);
   return DigestToUInt64(digest);