Fix build with gcc after #313406

chrome/browser/history/in_memory_history_backend.h

 // Copyright (c) 2012 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.
 
 // The InMemoryHistoryBackend is a wrapper around the in-memory URL database.
 // It maintains an in-memory cache of a subset of history that is required for
 // low-latency operations, such as in-line autocomplete.
 //
 // The in-memory cache provides the following guarantees:
 //  (1.) It will always contain URLRows that either have a |typed_count| > 0; or
@@ skipping 73 matching lines @@
                      bool expired,
                      const URLRows& deleted_rows,
                      const std::set<GURL>& favicon_urls) override;
   void OnKeywordSearchTermUpdated(HistoryService* history_service,
                                   const URLRow& row,
                                   KeywordID keyword_id,
                                   const base::string16& term) override;
   void OnKeywordSearchTermDeleted(HistoryService* history_service,
                                   URLID url_id) override;
 
- private:
-  FRIEND_TEST_ALL_PREFIXES(HistoryBackendTest, DeleteAll);
-
   // Handler for HISTORY_URL_VISITED and HISTORY_URLS_MODIFIED.
   void OnURLVisitedOrModified(const URLRow& url_row);
 
   scoped_ptr<InMemoryDatabase> db_;
 
   ScopedObserver<HistoryService, HistoryServiceObserver>
       history_service_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(InMemoryHistoryBackend);
 };
 
 }  // namespace history
 
 #endif  // CHROME_BROWSER_HISTORY_IN_MEMORY_HISTORY_BACKEND_H_