Add OVERRIDE to chrome/browser/extensions/.

chrome/browser/extensions/extensions_quota_service.h

 // Copyright (c) 2011 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 ExtensionsQuotaService 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 172 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(QuotaLimitHeuristic);
 };
 
 // A simple per-item heuristic to limit the number of events that can occur in
 // a given period of time; e.g "no more than 100 events in an hour".
 class ExtensionsQuotaService::TimedLimit : public QuotaLimitHeuristic {
  public:
   TimedLimit(const Config& config, BucketMapper* map)
       : QuotaLimitHeuristic(config, map) {}
-  virtual bool Apply(Bucket* bucket, const base::TimeTicks& event_time);
+  virtual bool Apply(Bucket* bucket,
+                     const base::TimeTicks& event_time) OVERRIDE;
 };
 
 // A per-item heuristic to limit the number of events that can occur in a
 // period of time over a sustained longer interval. E.g "no more than two
 // events per minute, sustained over 10 minutes".
 class ExtensionsQuotaService::SustainedLimit : public QuotaLimitHeuristic {
  public:
   SustainedLimit(const base::TimeDelta& sustain,
                  const Config& config,
                  BucketMapper* map);
-  virtual bool Apply(Bucket* bucket, const base::TimeTicks& event_time);
+  virtual bool Apply(Bucket* bucket,
+                     const base::TimeTicks& event_time) OVERRIDE;
  private:
   // Specifies how long exhaustion of buckets is allowed to continue before
   // denying requests.
   const int64 repeat_exhaustion_allowance_;
   int64 num_available_repeat_exhaustions_;
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSIONS_QUOTA_SERVICE_H_