RefCounted types should not have public destructors, chrome/browser/ part 2

chrome/browser/sync/profile_sync_service_typed_url_unittest.cc

Index: chrome/browser/sync/profile_sync_service_typed_url_unittest.cc
diff --git a/chrome/browser/sync/profile_sync_service_typed_url_unittest.cc b/chrome/browser/sync/profile_sync_service_typed_url_unittest.cc
index 953592b3788dd0a101a91f37eb2b94a75576363c..22a9e37e8dc8414ce22b630b802ab369103e1391 100644
--- a/chrome/browser/sync/profile_sync_service_typed_url_unittest.cc
+++ b/chrome/browser/sync/profile_sync_service_typed_url_unittest.cc
@@ -102,6 +102,9 @@ class HistoryBackendMock : public HistoryBackend {
   MOCK_METHOD2(GetURL, bool(const GURL& url_id, history::URLRow* url_row));
   MOCK_METHOD2(SetPageTitle, void(const GURL& url, const string16& title));
   MOCK_METHOD1(DeleteURL, void(const GURL& url));
+
+ private:
+  virtual ~HistoryBackendMock() {}
 };
 
 class HistoryServiceMock : public HistoryService {
@@ -109,6 +112,9 @@ class HistoryServiceMock : public HistoryService {
   HistoryServiceMock() {}
   MOCK_METHOD2(ScheduleDBTask, void(HistoryDBTask*,
                                     CancelableRequestConsumerBase*));
+
+ private:
+  virtual ~HistoryServiceMock() {}
 };
 
 void RunOnDBThreadCallback(HistoryBackend* backend,