Standardize usage of virtual/override/final in content/browser/

content/browser/service_worker/service_worker_context_core.h

Index: content/browser/service_worker/service_worker_context_core.h
diff --git a/content/browser/service_worker/service_worker_context_core.h b/content/browser/service_worker/service_worker_context_core.h
index 87c69099daa9f0e262f0e98a5fba58388d32885b..63522ea3b39ac1b8d1cf152bc06a5eaf01faff71 100644
--- a/content/browser/service_worker/service_worker_context_core.h
+++ b/content/browser/service_worker/service_worker_context_core.h
@@ -108,23 +108,23 @@ class CONTENT_EXPORT ServiceWorkerContextCore
   ServiceWorkerContextCore(
       ServiceWorkerContextCore* old_context,
       ServiceWorkerContextWrapper* wrapper);
-  virtual ~ServiceWorkerContextCore();
+  ~ServiceWorkerContextCore() override;
 
   // ServiceWorkerVersion::Listener overrides.
-  virtual void OnWorkerStarted(ServiceWorkerVersion* version) override;
-  virtual void OnWorkerStopped(ServiceWorkerVersion* version) override;
-  virtual void OnVersionStateChanged(ServiceWorkerVersion* version) override;
-  virtual void OnErrorReported(ServiceWorkerVersion* version,
-                               const base::string16& error_message,
-                               int line_number,
-                               int column_number,
-                               const GURL& source_url) override;
-  virtual void OnReportConsoleMessage(ServiceWorkerVersion* version,
-                                      int source_identifier,
-                                      int message_level,
-                                      const base::string16& message,
-                                      int line_number,
-                                      const GURL& source_url) override;
+  void OnWorkerStarted(ServiceWorkerVersion* version) override;
+  void OnWorkerStopped(ServiceWorkerVersion* version) override;
+  void OnVersionStateChanged(ServiceWorkerVersion* version) override;
+  void OnErrorReported(ServiceWorkerVersion* version,
+                       const base::string16& error_message,
+                       int line_number,
+                       int column_number,
+                       const GURL& source_url) override;
+  void OnReportConsoleMessage(ServiceWorkerVersion* version,
+                              int source_identifier,
+                              int message_level,
+                              const base::string16& message,
+                              int line_number,
+                              const GURL& source_url) override;
 
   ServiceWorkerStorage* storage() { return storage_.get(); }
   ServiceWorkerCacheStorageManager* cache_manager() {