[USS] Show USS counters in about:sync page

components/sync/driver/glue/sync_backend_host_core.h

 // Copyright 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.
 
 #ifndef COMPONENTS_SYNC_DRIVER_GLUE_SYNC_BACKEND_HOST_CORE_H_
 #define COMPONENTS_SYNC_DRIVER_GLUE_SYNC_BACKEND_HOST_CORE_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 122 matching lines @@
   void OnPassphraseTypeChanged(syncer::PassphraseType type,
                                base::Time passphrase_time) override;
   void OnLocalSetPassphraseEncryption(
       const syncer::SyncEncryptionHandler::NigoriState& nigori_state) override;
 
   // TypeDebugInfoObserver implementation
   void OnCommitCountersUpdated(syncer::ModelType type,
                                const syncer::CommitCounters& counters) override;
   void OnUpdateCountersUpdated(syncer::ModelType type,
                                const syncer::UpdateCounters& counters) override;
-  void OnStatusCountersUpdated(syncer::ModelType type,
-                               const syncer::StatusCounters& counters) override;
+  void OnStatusCountersUpdated(
+      syncer::ModelType type,
+      std::unique_ptr<syncer::StatusCounters> counters) override;
 
   // Forwards an invalidation state change to the sync manager.
   void DoOnInvalidatorStateChange(syncer::InvalidatorState state);
 
   // Forwards an invalidation to the sync manager.
   void DoOnIncomingInvalidation(
       const syncer::ObjectIdInvalidationMap& invalidation_map);
 
   // Note:
   //
@@ skipping 170 matching lines @@
   std::map<syncer::ModelType, int64_t> last_invalidation_versions_;
 
   base::WeakPtrFactory<SyncBackendHostCore> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncBackendHostCore);
 };
 
 }  // namespace browser_sync
 
 #endif  // COMPONENTS_SYNC_DRIVER_GLUE_SYNC_BACKEND_HOST_CORE_H_