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

components/sync/driver/fake_sync_service.cc

Index: components/sync/driver/fake_sync_service.cc
diff --git a/components/sync/driver/fake_sync_service.cc b/components/sync/driver/fake_sync_service.cc
index 5cede642ffba22d9c89341295bf9c386de12694c..fcc3d69c8e690b09a76489eed87d4dc02ffca375 100644
--- a/components/sync/driver/fake_sync_service.cc
+++ b/components/sync/driver/fake_sync_service.cc
@@ -92,7 +92,7 @@ bool FakeSyncService::HasUnrecoverableError() const {
   return false;
 }
 
-bool FakeSyncService::IsBackendInitialized() const {
+bool FakeSyncService::IsEngineInitialized() const {
   return false;
 }
 
@@ -166,7 +166,7 @@ base::string16 FakeSyncService::GetLastSyncedTimeString() const {
   return base::string16();
 }
 
-std::string FakeSyncService::GetBackendInitializationStateString() const {
+std::string FakeSyncService::GetEngineInitializationStateString() const {
   return std::string();
 }