Remove SyncSchedulerImpl::OnShouldStopSyncingPermanently

sync/test/engine/fake_sync_scheduler.cc

Index: sync/test/engine/fake_sync_scheduler.cc
diff --git a/sync/test/engine/fake_sync_scheduler.cc b/sync/test/engine/fake_sync_scheduler.cc
index f6144aadac6777fcace5df52d79e352f67f78859..6f704c6fa0da9f0a7cc1c8c31eab8e24f6eacf88 100644
--- a/sync/test/engine/fake_sync_scheduler.cc
+++ b/sync/test/engine/fake_sync_scheduler.cc
@@ -82,9 +82,6 @@ void FakeSyncScheduler::OnReceivedSessionsCommitDelay(
 void FakeSyncScheduler::OnReceivedClientInvalidationHintBufferSize(int size) {
 }
 
-void FakeSyncScheduler::OnShouldStopSyncingPermanently() {
-}
-
 void FakeSyncScheduler::OnSyncProtocolError(
      const sessions::SyncSessionSnapshot& snapshot) {
 }