Revert of Delete base/prefs and update callers to use components.

components/metrics/cloned_install_detector.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/cloned_install_detector.h"
 
 #include <stdint.h>
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/metrics/metrics_hashes.h"
+#include "base/prefs/pref_registry_simple.h"
+#include "base/prefs/pref_service.h"
 #include "base/single_thread_task_runner.h"
 #include "base/task_runner_util.h"
 #include "components/metrics/machine_id_provider.h"
 #include "components/metrics/metrics_pref_names.h"
-#include "components/prefs/pref_registry_simple.h"
-#include "components/prefs/pref_service.h"
 
 namespace metrics {
 
 namespace {
 
 uint32_t HashRawId(const std::string& value) {
   uint64_t hash = base::HashMetricName(value);
 
   // Only use 24 bits from the 64-bit hash.
   return hash & ((1 << 24) - 1);
@@ skipping 61 matching lines @@
 
   local_state->SetInteger(prefs::kMetricsMachineId, hashed_id);
 }
 
 // static
 void ClonedInstallDetector::RegisterPrefs(PrefRegistrySimple* registry) {
   registry->RegisterIntegerPref(prefs::kMetricsMachineId, 0);
 }
 
 }  // namespace metrics