Move HashMetricName to base namespace.

base/metrics/metrics_hashes_unittest.cc

Index: base/metrics/metrics_hashes_unittest.cc
diff --git a/components/metrics/metrics_hashes_unittest.cc b/base/metrics/metrics_hashes_unittest.cc
similarity index 92%
rename from components/metrics/metrics_hashes_unittest.cc
rename to base/metrics/metrics_hashes_unittest.cc
index b949058d64bc9b46a38e74ae0db59a6067831266..e07293375aa6e2b81a403122891690460c9327a9 100644
--- a/components/metrics/metrics_hashes_unittest.cc
+++ b/base/metrics/metrics_hashes_unittest.cc
@@ -2,13 +2,13 @@
 // 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/format_macros.h"
 #include "base/strings/stringprintf.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
-namespace metrics {
+namespace base {
 
 // Make sure our ID hashes are the same as what we see on the server side.
 TEST(MetricsUtilTest, HashMetricName) {