Convert //sync from scoped_ptr to std::unique_ptr

sync/engine/commit_processor.cc

 // Copyright 2014 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 "sync/engine/commit_processor.h"
 
 #include <stddef.h>
 
 #include <utility>
 
@@ skipping 19 matching lines @@
        it.Good(); it.Inc()) {
     CommitContributorMap::iterator cm_it =
         commit_contributor_map_->find(it.Get());
     if (cm_it == commit_contributor_map_->end()) {
       NOTREACHED()
           << "Could not find requested type " << ModelTypeToString(it.Get())
           << " in contributor map.";
       continue;
     }
     size_t spaces_remaining = max_entries - num_entries;
-    scoped_ptr<CommitContribution> contribution =
+    std::unique_ptr<CommitContribution> contribution =
         cm_it->second->GetContribution(spaces_remaining);
     if (contribution) {
       num_entries += contribution->GetNumEntries();
       contributions->insert(std::make_pair(it.Get(), std::move(contribution)));
     }
     if (num_entries >= max_entries) {
       DCHECK_EQ(num_entries, max_entries)
           << "Number of commit entries exceeeds maximum";
       break;
     }
   }
 }
 
 }  // namespace syncer