Consolidates accessing and setting the UMA pref to be within metrics code

chrome/browser/chromeos/settings/device_settings_provider.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/chromeos/settings/device_settings_provider.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/logging.h"
@@ skipping 830 matching lines @@
     AttemptMigration();
     VLOG(1) << "No metrics policy set will revert to checking "
             << "consent file which is "
             << (new_value ? "on." : "off.");
     UMA_HISTOGRAM_COUNTS("DeviceSettings.MetricsMigrated", 1);
   }
   VLOG(1) << "Metrics policy is being set to : " << new_value
           << "(use file : " << use_file << ")";
   // TODO(pastarmovj): Remove this once we don't need to regenerate the
   // consent file for the GUID anymore.
-  ResolveMetricsReportingEnabled(new_value);
+  base::Callback<void(bool)> callback_fn;
+  InitiateMetricsReportingChange(callback_fn, new_value);
 }
 
 void DeviceSettingsProvider::ApplySideEffects(
     const em::ChromeDeviceSettingsProto& settings) {
   // First migrate metrics settings as needed.
   if (settings.has_metrics_enabled())
     ApplyMetricsSetting(false, settings.metrics_enabled().metrics_enabled());
   else
     ApplyMetricsSetting(true, false);
 }
@@ skipping 142 matching lines @@
 void DeviceSettingsProvider::AttemptMigration() {
   if (device_settings_service_->HasPrivateOwnerKey()) {
     PrefValueMap::const_iterator i;
     for (i = migration_values_.begin(); i != migration_values_.end(); ++i)
       DoSet(i->first, *i->second);
     migration_values_.Clear();
   }
 }
 
 }  // namespace chromeos