sync: Remove SyncManager::TestingMode in favour of InternalComponentsFactory.

sync/engine/sync_scheduler.cc

Index: sync/engine/sync_scheduler.cc
diff --git a/sync/engine/sync_scheduler.cc b/sync/engine/sync_scheduler.cc
index 04b30f0d1028bd1a845cc11c3b0a64d441ddd8b2..94fe75cdcd8bd2782196e0db53af9292925b93e5 100644
--- a/sync/engine/sync_scheduler.cc
+++ b/sync/engine/sync_scheduler.cc
@@ -1183,7 +1183,7 @@ void SyncScheduler::OnSyncProtocolError(
     OnActionableError(snapshot);
 }
 
-void SyncScheduler::set_notifications_enabled(bool notifications_enabled) {
+void SyncScheduler::SetNotificationsEnabled(bool notifications_enabled) {
   DCHECK_EQ(MessageLoop::current(), sync_loop_);
   session_context_->set_notifications_enabled(notifications_enabled);
 }