[USS] Show USS counters in about:sync page

components/sync/driver/fake_sync_service.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 COMPONENTS_SYNC_DRIVER_FAKE_SYNC_SERVICE_H_
 #define COMPONENTS_SYNC_DRIVER_FAKE_SYNC_SERVICE_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 58 matching lines @@
   void RegisterDataTypeController(
       std::unique_ptr<sync_driver::DataTypeController> data_type_controller)
       override;
   void ReenableDatatype(syncer::ModelType type) override;
   SyncTokenStatus GetSyncTokenStatus() const override;
   std::string QuerySyncStatusSummaryString() override;
   bool QueryDetailedSyncStatus(syncer::SyncStatus* result) override;
   base::string16 GetLastSyncedTimeString() const override;
   std::string GetBackendInitializationStateString() const override;
   syncer::SyncCycleSnapshot GetLastCycleSnapshot() const override;
-  base::Value* GetTypeStatusMap() const override;
+  base::Value* GetTypeStatusMap() override;
   const GURL& sync_service_url() const override;
   std::string unrecoverable_error_message() const override;
   tracked_objects::Location unrecoverable_error_location() const override;
   void AddProtocolEventObserver(
       browser_sync::ProtocolEventObserver* observer) override;
   void RemoveProtocolEventObserver(
       browser_sync::ProtocolEventObserver* observer) override;
   void AddTypeDebugInfoObserver(
       syncer::TypeDebugInfoObserver* observer) override;
   void RemoveTypeDebugInfoObserver(
       syncer::TypeDebugInfoObserver* observer) override;
   base::WeakPtr<syncer::JsController> GetJsController() override;
   void GetAllNodes(const base::Callback<void(std::unique_ptr<base::ListValue>)>&
                        callback) override;
 
   // DataTypeEncryptionHandler:
   bool IsPassphraseRequired() const override;
   syncer::ModelTypeSet GetEncryptedDataTypes() const override;
 
   GoogleServiceAuthError error_;
   GURL sync_service_url_;
   std::string unrecoverable_error_message_;
   std::unique_ptr<syncer::UserShare> user_share_;
 };
 
 }  // namespace sync_driver
 
 #endif  // COMPONENTS_SYNC_DRIVER_FAKE_SYNC_SERVICE_H_