Standardize usage of virtual/override/final in components/

components/policy/core/browser/url_blacklist_policy_handler.h

Index: components/policy/core/browser/url_blacklist_policy_handler.h
diff --git a/components/policy/core/browser/url_blacklist_policy_handler.h b/components/policy/core/browser/url_blacklist_policy_handler.h
index bf399d68a827e87c4e67c5f946fa2d3a9a0bf567..b5d0709bad8b2d54f126b7bf22bb975e300bef19 100644
--- a/components/policy/core/browser/url_blacklist_policy_handler.h
+++ b/components/policy/core/browser/url_blacklist_policy_handler.h
@@ -17,13 +17,13 @@ class POLICY_EXPORT URLBlacklistPolicyHandler
     : public ConfigurationPolicyHandler {
  public:
   URLBlacklistPolicyHandler();
-  virtual ~URLBlacklistPolicyHandler();
+  ~URLBlacklistPolicyHandler() override;
 
   // ConfigurationPolicyHandler methods:
-  virtual bool CheckPolicySettings(const PolicyMap& policies,
-                                   PolicyErrorMap* errors) override;
-  virtual void ApplyPolicySettings(const PolicyMap& policies,
-                                   PrefValueMap* prefs) override;
+  bool CheckPolicySettings(const PolicyMap& policies,
+                           PolicyErrorMap* errors) override;
+  void ApplyPolicySettings(const PolicyMap& policies,
+                           PrefValueMap* prefs) override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(URLBlacklistPolicyHandler);