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

components/sync_sessions/lost_navigations_recorder.cc

 // Copyright 2016 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 "base/metrics/histogram_macros.h"
 #include "base/stl_util.h"
-#include "components/sync/api/sync_change.h"
 #include "components/sync/syncable/entry.h"
 #include "components/sync_sessions/lost_navigations_recorder.h"
 
 namespace sync_sessions {
 
 LostNavigationsRecorder::LostNavigationsRecorder()
     : recorder_state_(RECORDER_STATE_NOT_SYNCING) {}
 
 LostNavigationsRecorder::~LostNavigationsRecorder() {}
 
@@ skipping 109 matching lines @@
 
     // The set of lost navigations is anything we recorded as new that's not
     // present in latest.
     IdSet lost_navs = base::STLSetDifference<IdSet>(recorded, latest);
     int quantity_lost = lost_navs.size();
     UMA_HISTOGRAM_COUNTS("Sync.LostNavigationCount", quantity_lost);
     recorded.clear();
   }
 }
 }  // namespace sync_sessions