[Sync] SyncEngine 1.5: Fix all backend references in PSS.

chrome/browser/supervised_user/supervised_user_service.cc

Index: chrome/browser/supervised_user/supervised_user_service.cc
diff --git a/chrome/browser/supervised_user/supervised_user_service.cc b/chrome/browser/supervised_user/supervised_user_service.cc
index 1f257853e9f11c9f7d0942abce31e321cb4a4ac1..aed7f3d89a55ad335743481e7876bb978668c795 100644
--- a/chrome/browser/supervised_user/supervised_user_service.cc
+++ b/chrome/browser/supervised_user/supervised_user_service.cc
@@ -723,14 +723,14 @@ void SupervisedUserService::StartSetupSync() {
 }
 
 void SupervisedUserService::FinishSetupSyncWhenReady() {
-  // If we're already waiting for the Sync backend, there's nothing to do here.
+  // If we're already waiting for the sync engine, there's nothing to do here.
   if (waiting_for_sync_initialization_)
     return;
 
-  // Continue in FinishSetupSync() once the Sync backend has been initialized.
+  // Continue in FinishSetupSync() once the sync engine has been initialized.
   browser_sync::ProfileSyncService* service =
       ProfileSyncServiceFactory::GetForProfile(profile_);
-  if (service->IsBackendInitialized()) {
+  if (service->IsEngineInitialized()) {
     FinishSetupSync();
   } else {
     service->AddObserver(this);
@@ -741,7 +741,7 @@ void SupervisedUserService::FinishSetupSyncWhenReady() {
 void SupervisedUserService::FinishSetupSync() {
   browser_sync::ProfileSyncService* service =
       ProfileSyncServiceFactory::GetForProfile(profile_);
-  DCHECK(service->IsBackendInitialized());
+  DCHECK(service->IsEngineInitialized());
 
   // Sync nothing (except types which are set via GetPreferredDataTypes).
   bool sync_everything = false;
@@ -1263,7 +1263,7 @@ syncer::ModelTypeSet SupervisedUserService::GetPreferredDataTypes() const {
 void SupervisedUserService::OnStateChanged() {
   browser_sync::ProfileSyncService* service =
       ProfileSyncServiceFactory::GetForProfile(profile_);
-  if (waiting_for_sync_initialization_ && service->IsBackendInitialized()) {
+  if (waiting_for_sync_initialization_ && service->IsEngineInitialized()) {
     waiting_for_sync_initialization_ = false;
     service->RemoveObserver(this);
     FinishSetupSync();