Standardize usage of virtual/override/final in chrome/browser/safe_browsing/

chrome/browser/safe_browsing/safe_browsing_service.cc

Index: chrome/browser/safe_browsing/safe_browsing_service.cc
diff --git a/chrome/browser/safe_browsing/safe_browsing_service.cc b/chrome/browser/safe_browsing/safe_browsing_service.cc
index a232dc717ef7d174cbb14241e9522ad306f691d5..f100f9b7503d6fa2caa641e53da99d3ee57c20ae 100644
--- a/chrome/browser/safe_browsing/safe_browsing_service.cc
+++ b/chrome/browser/safe_browsing/safe_browsing_service.cc
@@ -108,12 +108,12 @@ class SafeBrowsingURLRequestContextGetter
       SafeBrowsingService* sb_service_);
 
   // Implementation for net::UrlRequestContextGetter.
-  virtual net::URLRequestContext* GetURLRequestContext() override;
-  virtual scoped_refptr<base::SingleThreadTaskRunner>
-      GetNetworkTaskRunner() const override;
+  net::URLRequestContext* GetURLRequestContext() override;
+  scoped_refptr<base::SingleThreadTaskRunner> GetNetworkTaskRunner()
+      const override;
 
  protected:
-  virtual ~SafeBrowsingURLRequestContextGetter();
+  ~SafeBrowsingURLRequestContextGetter() override;
 
  private:
   SafeBrowsingService* const sb_service_;  // Owned by BrowserProcess.
@@ -151,7 +151,7 @@ SafeBrowsingServiceFactory* SafeBrowsingService::factory_ = NULL;
 // don't leak it.
 class SafeBrowsingServiceFactoryImpl : public SafeBrowsingServiceFactory {
  public:
-  virtual SafeBrowsingService* CreateSafeBrowsingService() override {
+  SafeBrowsingService* CreateSafeBrowsingService() override {
     return new SafeBrowsingService();
   }