[Sync] Rename SyncEnabledAndLoggedIn() to CanStartSync().

components/sync_driver/fake_sync_service.cc

 // Copyright 2015 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_driver/fake_sync_service.h"
 
 namespace sync_driver {
 
 FakeSyncService::FakeSyncService() : error_(GoogleServiceAuthError::NONE) {
 }
@@ skipping 22 matching lines @@
 
 void FakeSyncService::RemoveObserver(
     sync_driver::SyncServiceObserver* observer) {
 }
 
 bool FakeSyncService::HasObserver(
     const sync_driver::SyncServiceObserver* observer) const {
   return false;
 }
 
-bool FakeSyncService::IsSyncEnabledAndLoggedIn() {
+bool FakeSyncService::CanSyncStart() const {
   return false;
 }
 
 void FakeSyncService::DisableForUser() {
 }
 
 void FakeSyncService::RequestStop() {
 }
 
 void FakeSyncService::RequestStart() {
@@ skipping 62 matching lines @@
 
 bool FakeSyncService::IsPassphraseRequired() const {
   return false;
 }
 
 syncer::ModelTypeSet FakeSyncService::GetEncryptedDataTypes() const {
   return syncer::ModelTypeSet();
 }
 
 }  // namespace sync_driver