[Sync] Removing duplicated includes between cc and h files.

components/sync/core_impl/change_reorder_buffer.cc

 // Copyright 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/core_impl/change_reorder_buffer.h"
 
-#include <stdint.h>
-
 #include <limits>
 #include <queue>
 #include <set>
 #include <utility>  // for pair<>
 
-#include "base/macros.h"
 #include "components/sync/core/base_node.h"
 #include "components/sync/core/base_transaction.h"
 #include "components/sync/syncable/entry.h"
 #include "components/sync/syncable/syncable_base_transaction.h"
 
 using std::numeric_limits;
 using std::pair;
 using std::queue;
 using std::set;
 
@@ skipping 190 matching lines @@
       CHECK(j->first == next);
       to_visit.push(j->second);
     }
   }
 
   *changes = ImmutableChangeRecordList(&changelist);
   return true;
 }
 
 }  // namespace syncer