[USS] Show USS counters in about:sync page

components/sync/driver/fake_sync_service.h

Index: components/sync/driver/fake_sync_service.h
diff --git a/components/sync/driver/fake_sync_service.h b/components/sync/driver/fake_sync_service.h
index 7f051f5e7e45d0117435ac87cfac57ec4a843a3b..9524ce4920989be5650ee6ee2c0fe0ec16d9a3f5 100644
--- a/components/sync/driver/fake_sync_service.h
+++ b/components/sync/driver/fake_sync_service.h
@@ -76,7 +76,7 @@ class FakeSyncService : public sync_driver::SyncService {
   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;