Add OVERRIDE to chrome/browser/extensions/.

chrome/browser/extensions/extensions_quota_service.h

Index: chrome/browser/extensions/extensions_quota_service.h
diff --git a/chrome/browser/extensions/extensions_quota_service.h b/chrome/browser/extensions/extensions_quota_service.h
index 0f166862f858e299ac9b6c61d40cd110d3df1c97..2f0cab097b556db6aca4e07af7b3318c6ca6a18b 100644
--- a/chrome/browser/extensions/extensions_quota_service.h
+++ b/chrome/browser/extensions/extensions_quota_service.h
@@ -190,7 +190,8 @@ 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
@@ -201,7 +202,8 @@ class ExtensionsQuotaService::SustainedLimit : public QuotaLimitHeuristic {
   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.