Count exact cache size for time ranges

chrome/browser/browsing_data/cache_counter.h

 // Copyright (c) 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 CHROME_BROWSER_BROWSING_DATA_CACHE_COUNTER_H_
 #define CHROME_BROWSER_BROWSING_DATA_CACHE_COUNTER_H_
 
 #include <stdint.h>
 
 #include "base/memory/weak_ptr.h"
@@ skipping 26 matching lines @@
 
   explicit CacheCounter(Profile* profile);
   ~CacheCounter() override;
 
   const char* GetPrefName() const override;
 
   // Whether this counter awaits the calculation result callback.
   // Used only for testing.
   bool Pending();
 
+  // Used only for testing.
+  void SetTimeout(base::TimeDelta timeout);
+
  private:
   void Count() override;
   void OnCacheSizeCalculated(bool is_upper_limit, int64_t bytes);
   void FetchEstimate(
       base::WeakPtr<browsing_data::ConditionalCacheCountingHelper>);
 
   Profile* profile_;
   bool pending_;
+  base::TimeDelta timeout_;
 
   base::WeakPtrFactory<CacheCounter> weak_ptr_factory_;
 
 };
 
 #endif  // CHROME_BROWSER_BROWSING_DATA_CACHE_COUNTER_H_