Rewire the local sync switches through the pref store.

components/sync/base/sync_prefs.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 "components/sync/base/sync_prefs.h"
 
 #include "base/base64.h"
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/values.h"
@@ skipping 68 matching lines @@
   registry->RegisterStringPref(prefs::kSyncSessionsGUID, std::string());
   registry->RegisterBooleanPref(prefs::kSyncPassphrasePrompted, false);
   registry->RegisterIntegerPref(prefs::kSyncMemoryPressureWarningCount, -1);
   registry->RegisterBooleanPref(prefs::kSyncShutdownCleanly, false);
   registry->RegisterDictionaryPref(prefs::kSyncInvalidationVersions);
   registry->RegisterStringPref(prefs::kSyncLastRunVersion, std::string());
   registry->RegisterBooleanPref(
       prefs::kSyncPassphraseEncryptionTransitionInProgress, false);
   registry->RegisterStringPref(prefs::kSyncNigoriStateForPassphraseTransition,
                                std::string());
+  registry->RegisterBooleanPref(prefs::kEnableLocalSyncBackend, false);
+  registry->RegisterFilePathPref(prefs::kLocalSyncBackendDir, base::FilePath());
 }
 
 void SyncPrefs::AddSyncPrefObserver(SyncPrefObserver* sync_pref_observer) {
   DCHECK(CalledOnValidThread());
   sync_pref_observers_.AddObserver(sync_pref_observer);
 }
 
 void SyncPrefs::RemoveSyncPrefObserver(SyncPrefObserver* sync_pref_observer) {
   DCHECK(CalledOnValidThread());
   sync_pref_observers_.RemoveObserver(sync_pref_observer);
@@ skipping 440 matching lines @@
 void SyncPrefs::GetNigoriSpecificsForPassphraseTransition(
     sync_pb::NigoriSpecifics* nigori_specifics) const {
   const std::string encoded =
       pref_service_->GetString(prefs::kSyncNigoriStateForPassphraseTransition);
   std::string decoded;
   if (base::Base64Decode(encoded, &decoded)) {
     nigori_specifics->ParseFromString(decoded);
   }
 }
 
+bool SyncPrefs::IsLocalSyncEnabled() const {
+  return pref_service_->GetBoolean(prefs::kEnableLocalSyncBackend);
+}
+
+base::FilePath SyncPrefs::GetLocalSyncBackendDir() const {
+  return pref_service_->GetFilePath(prefs::kLocalSyncBackendDir);
+}
+
 }  // namespace syncer