Move MetricsStateManager into the Metrics component.

chrome/browser/metrics/metrics_log.cc

 // Copyright (c) 2012 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 "chrome/browser/metrics/metrics_log.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
@@ skipping 35 matching lines @@
 namespace {
 
 // Returns the date at which the current metrics client ID was created as
 // a string containing seconds since the epoch, or "0" if none was found.
 std::string GetMetricsEnabledDate(PrefService* pref) {
   if (!pref) {
     NOTREACHED();
     return "0";
   }
 
-  return pref->GetString(prefs::kMetricsReportingEnabledTimestamp);
+  return pref->GetString(metrics::prefs::kMetricsReportingEnabledTimestamp);
 }
 
 // Computes a SHA-1 hash of |data| and returns it as a hex string.
 std::string ComputeSHA1(const std::string& data) {
   const std::string sha1 = base::SHA1HashString(data);
   return base::HexEncode(sha1.data(), sha1.size());
 }
 
 void WriteFieldTrials(const std::vector<ActiveGroupId>& field_trial_ids,
                       SystemProfileProto* system_profile) {
@@ skipping 238 matching lines @@
   local_state->ClearPref(prefs::kStabilitySavedSystemProfile);
   local_state->ClearPref(prefs::kStabilitySavedSystemProfileHash);
 
   SystemProfileProto* system_profile = uma_proto()->mutable_system_profile();
   std::string serialied_system_profile;
   return base::Base64Decode(base64_system_profile, &serialied_system_profile) &&
          ComputeSHA1(serialied_system_profile) == system_profile_hash &&
          system_profile->ParseFromString(serialied_system_profile);
 }