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

components/sync/engine_impl/sync_scheduler_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/sync/engine_impl/sync_scheduler_impl.h"
 
 #include <algorithm>
 #include <cstring>
 #include <utility>
 
@@ skipping 393 matching lines @@
   DCHECK(!types.Empty());
 
   SDVLOG_LOC(nudge_location, 2)
       << "Scheduling sync because of local refresh request for "
       << ModelTypeSetToString(types);
   base::TimeDelta nudge_delay = nudge_tracker_.RecordLocalRefreshRequest(types);
   ScheduleNudgeImpl(nudge_delay, nudge_location);
 }
 
 void SyncSchedulerImpl::ScheduleInvalidationNudge(
-    syncer::ModelType model_type,
+    ModelType model_type,
     std::unique_ptr<InvalidationInterface> invalidation,
     const tracked_objects::Location& nudge_location) {
   DCHECK(CalledOnValidThread());
 
   SDVLOG_LOC(nudge_location, 2)
       << "Scheduling sync because we received invalidation for "
       << ModelTypeToString(model_type);
   base::TimeDelta nudge_delay = nudge_tracker_.RecordRemoteInvalidation(
       model_type, std::move(invalidation));
   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 "
             << ModelTypeToString(model_type);
   nudge_tracker_.RecordInitialSyncRequired(model_type);
   ScheduleNudgeImpl(TimeDelta::FromSeconds(0), FROM_HERE);
 }
 
 // TODO(zea): Consider adding separate throttling/backoff for datatype
 // refresh requests.
@@ skipping 523 matching lines @@
 
 #undef SDVLOG_LOC
 
 #undef SDVLOG
 
 #undef SLOG
 
 #undef ENUM_CASE
 
 }  // namespace syncer