[USS] Show USS counters in about:sync page

ios/chrome/browser/ui/webui/sync_internals/sync_internals_message_handler.h

 // Copyright 2015 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 IOS_CHROME_BROWSER_UI_WEBUI_SYNC_INTERNALS_SYNC_INTERNALS_MESSAGE_HANDLER_H_
 #define IOS_CHROME_BROWSER_UI_WEBUI_SYNC_INTERNALS_SYNC_INTERNALS_MESSAGE_HANDLER_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 49 matching lines @@
   void OnStateChanged() override;
 
   // ProtocolEventObserver implementation.
   void OnProtocolEvent(const syncer::ProtocolEvent& e) 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;
 
   // Helper to emit counter updates.
   //
   // Used in implementation of On*CounterUpdated methods.  Emits the given
   // dictionary value with additional data to specify the model type and
   // counter type.
   void EmitCounterUpdate(syncer::ModelType type,
                          const std::string& counter_type,
                          std::unique_ptr<base::DictionaryValue> value);
 
@@ skipping 12 matching lines @@
   // A flag used to prevent double-registration as TypeDebugInfoObserver with
   // ProfileSyncService.
   bool is_registered_for_counters_;
 
   base::WeakPtrFactory<SyncInternalsMessageHandler> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncInternalsMessageHandler);
 };
 
 #endif  // IOS_CHROME_BROWSER_UI_WEBUI_SYNC_INTERNALS_SYNC_INTERNALS_MESSAGE_HANDLER_H_