[Sync] Move //components/sync to the syncer namespace.

components/sync/engine_impl/sync_scheduler_impl.cc

Index: components/sync/engine_impl/sync_scheduler_impl.cc
diff --git a/components/sync/engine_impl/sync_scheduler_impl.cc b/components/sync/engine_impl/sync_scheduler_impl.cc
index c4362ac0c4d7648adedb63215347f934af907a7b..629e47982646010e9ed1eaa2f4e7eef64c400288 100644
--- a/components/sync/engine_impl/sync_scheduler_impl.cc
+++ b/components/sync/engine_impl/sync_scheduler_impl.cc
@@ -413,7 +413,7 @@ void SyncSchedulerImpl::ScheduleLocalRefreshRequest(
 }
 
 void SyncSchedulerImpl::ScheduleInvalidationNudge(
-    syncer::ModelType model_type,
+    ModelType model_type,
     std::unique_ptr<InvalidationInterface> invalidation,
     const tracked_objects::Location& nudge_location) {
   DCHECK(CalledOnValidThread());
@@ -426,7 +426,7 @@ void SyncSchedulerImpl::ScheduleInvalidationNudge(
   ScheduleNudgeImpl(nudge_delay, nudge_location);
 }
 
-void SyncSchedulerImpl::ScheduleInitialSyncNudge(syncer::ModelType model_type) {
+void SyncSchedulerImpl::ScheduleInitialSyncNudge(ModelType model_type) {
   DCHECK(CalledOnValidThread());
 
   SDVLOG(2) << "Scheduling non-blocking initial sync for "