Template methods on Timer classes instead of the classes themselves.

extensions/browser/quota_service.h

 // Copyright 2013 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 QuotaService uses heuristics to limit abusive requests
 // made by extensions.  In this model 'items' (e.g individual bookmarks) are
 // represented by a 'Bucket' that holds state for that item for one single
 // interval of time.  The interval of time is defined as 'how long we need to
 // watch an item (for a particular heuristic) before making a decision about
 // quota violations'.  A heuristic is two functions: one mapping input
@@ skipping 51 matching lines @@
   typedef std::string ExtensionId;
   typedef std::string FunctionName;
   // All QuotaLimitHeuristic instances in this map are owned by us.
   typedef std::map<FunctionName, QuotaLimitHeuristics> FunctionHeuristicsMap;
 
   // Purge resets all accumulated data as if the service was just created.
   // Called periodically so we don't consume an unbounded amount of memory
   // while tracking quota.
   void Purge();
   void PurgeFunctionHeuristicsMap(FunctionHeuristicsMap* map);
-  base::RepeatingTimer<QuotaService> purge_timer_;
+  base::RepeatingTimer purge_timer_;
 
   // Our quota tracking state for extensions that have invoked quota limited
   // functions.  Each extension is treated separately, so extension ids are the
   // key for the mapping.  As an extension invokes functions, the map keeps
   // track of which functions it has invoked and the heuristics for each one.
   // Each heuristic will be evaluated and ANDed together to get a final answer.
   std::map<ExtensionId, FunctionHeuristicsMap> function_heuristics_;
 
   DISALLOW_COPY_AND_ASSIGN(QuotaService);
 };
@@ skipping 119 matching lines @@
 class QuotaService::TimedLimit : public QuotaLimitHeuristic {
  public:
   TimedLimit(const Config& config, BucketMapper* map, const std::string& name)
       : QuotaLimitHeuristic(config, map, name) {}
   bool Apply(Bucket* bucket, const base::TimeTicks& event_time) override;
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_QUOTA_SERVICE_H_