Further refactoring of SBER1 preference usage.

components/safe_browsing_db/safe_browsing_prefs.cc

 // Copyright (c) 2016 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 "base/metrics/histogram_macros.h"
 #include "components/prefs/pref_service.h"
 #include "components/safe_browsing_db/safe_browsing_prefs.h"
 
 namespace prefs {
 
 // Boolean that tell us whether Safe Browsing extended reporting is enabled.
 const char kSafeBrowsingExtendedReportingEnabled[] =
     "safebrowsing.extended_reporting_enabled";
 
 }  // namespace prefs
 
 namespace safe_browsing {
 
+bool ExtendedReportingPrefExists(const PrefService& prefs) {
+  return prefs.HasPrefPath(GetExtendedReportingPrefName());
+}
+
 const char* GetExtendedReportingPrefName() {
   return prefs::kSafeBrowsingExtendedReportingEnabled;
 }
 
 bool IsExtendedReportingEnabled(const PrefService& prefs) {
   return prefs.GetBoolean(GetExtendedReportingPrefName());
 }
 
 void RecordExtendedReportingMetrics(const PrefService& prefs) {
   UMA_HISTOGRAM_BOOLEAN("SafeBrowsing.Pref.Extended",
                         IsExtendedReportingEnabled(prefs));
 }
 
+void SetExtendedReportingPref(PrefService* prefs, bool value) {
+  prefs->SetBoolean(GetExtendedReportingPrefName(), value);
+}
+
 }  // namespace safe_browsing