Standardize usage of virtual/override/final in components/

components/metrics/test_metrics_service_client.h

Index: components/metrics/test_metrics_service_client.h
diff --git a/components/metrics/test_metrics_service_client.h b/components/metrics/test_metrics_service_client.h
index 8565ca93b431597c0a6e7bcfdc819875ee48b1bb..c46ac4e9b052deba9d250bb44cd9c8c0591d6f80 100644
--- a/components/metrics/test_metrics_service_client.h
+++ b/components/metrics/test_metrics_service_client.h
@@ -18,22 +18,20 @@ class TestMetricsServiceClient : public MetricsServiceClient {
   static const char kBrandForTesting[];
 
   TestMetricsServiceClient();
-  virtual ~TestMetricsServiceClient();
+  ~TestMetricsServiceClient() override;
 
   // MetricsServiceClient:
-  virtual void SetMetricsClientId(const std::string& client_id) override;
-  virtual bool IsOffTheRecordSessionActive() override;
-  virtual int32_t GetProduct() override;
-  virtual std::string GetApplicationLocale() override;
-  virtual bool GetBrand(std::string* brand_code) override;
-  virtual SystemProfileProto::Channel GetChannel() override;
-  virtual std::string GetVersionString() override;
-  virtual void OnLogUploadComplete() override;
-  virtual void StartGatheringMetrics(
-      const base::Closure& done_callback) override;
-  virtual void CollectFinalMetrics(const base::Closure& done_callback)
-      override;
-  virtual scoped_ptr<MetricsLogUploader> CreateUploader(
+  void SetMetricsClientId(const std::string& client_id) override;
+  bool IsOffTheRecordSessionActive() override;
+  int32_t GetProduct() override;
+  std::string GetApplicationLocale() override;
+  bool GetBrand(std::string* brand_code) override;
+  SystemProfileProto::Channel GetChannel() override;
+  std::string GetVersionString() override;
+  void OnLogUploadComplete() override;
+  void StartGatheringMetrics(const base::Closure& done_callback) override;
+  void CollectFinalMetrics(const base::Closure& done_callback) override;
+  scoped_ptr<MetricsLogUploader> CreateUploader(
       const std::string& server_url,
       const std::string& mime_type,
       const base::Callback<void(int)>& on_upload_complete) override;