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

components/sync_sessions/sessions_sync_manager.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 "components/sync_sessions/sessions_sync_manager.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/memory/ptr_util.h"
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram_macros.h"
 #include "build/build_config.h"
 #include "components/sync/api/sync_error.h"
 #include "components/sync/api/sync_error_factory.h"
 #include "components/sync/api/sync_merge_result.h"
 #include "components/sync/api/time.h"
 #include "components/sync/device_info/local_device_info_provider.h"
 #include "components/sync/syncable/syncable_util.h"
-#include "components/sync_sessions/lost_navigations_recorder.h"
 #include "components/sync_sessions/sync_sessions_client.h"
 #include "components/sync_sessions/synced_tab_delegate.h"
 #include "components/sync_sessions/synced_window_delegate.h"
 #include "components/sync_sessions/synced_window_delegates_getter.h"
 #include "components/variations/variations_associated_data.h"
 
 using sessions::SerializedNavigationEntry;
 using sync_driver::DeviceInfo;
 using sync_driver::LocalDeviceInfoProvider;
 using syncer::SyncChange;
@@ skipping 1077 matching lines @@
 }
 
 // static
 std::string SessionsSyncManager::TagHashFromSpecifics(
     const sync_pb::SessionSpecifics& specifics) {
   return syncer::syncable::GenerateSyncableHash(syncer::SESSIONS,
                                                 TagFromSpecifics(specifics));
 }
 
 };  // namespace sync_sessions