Re-write many calls to WrapUnique() with MakeUnique()

components/sync/engine_impl/cycle/nudge_tracker.cc

 // Copyright (c) 2013 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/cycle/nudge_tracker.h"
 
 #include <stddef.h>
 
 #include <utility>
 
@@ skipping 46 matching lines @@
           base::TimeDelta::FromMilliseconds(kDefaultNudgeDelayMilliseconds)),
       local_refresh_nudge_delay_(
           base::TimeDelta::FromMilliseconds(kSyncRefreshDelayMilliseconds)),
       remote_invalidation_nudge_delay_(
           base::TimeDelta::FromMilliseconds(kSyncSchedulerDelayMilliseconds)) {
   ModelTypeSet protocol_types = ProtocolTypes();
   // Default initialize all the type trackers.
   for (ModelTypeSet::Iterator it = protocol_types.First(); it.Good();
        it.Inc()) {
     type_trackers_.insert(
-        std::make_pair(it.Get(), base::WrapUnique(new DataTypeTracker())));
+        std::make_pair(it.Get(), base::MakeUnique<DataTypeTracker>()));
   }
 }
 
 NudgeTracker::~NudgeTracker() {}
 
 bool NudgeTracker::IsSyncRequired() const {
   if (IsRetryRequired())
     return true;
 
   for (TypeTrackerMap::const_iterator it = type_trackers_.begin();
@@ skipping 321 matching lines @@
           GetDefaultDelayForType(type, minimum_local_nudge_delay_));
     }
   }
 }
 
 void NudgeTracker::SetDefaultNudgeDelay(base::TimeDelta nudge_delay) {
   minimum_local_nudge_delay_ = nudge_delay;
 }
 
 }  // namespace syncer