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

chrome/browser/signin/easy_unlock_toggle_flow.h

Index: chrome/browser/signin/easy_unlock_toggle_flow.h
diff --git a/chrome/browser/signin/easy_unlock_toggle_flow.h b/chrome/browser/signin/easy_unlock_toggle_flow.h
index 303b843c514ed82544254cdb1bc128b76c12e2db..7e04f02509072d0aa1fe6514735258405d202d10 100644
--- a/chrome/browser/signin/easy_unlock_toggle_flow.h
+++ b/chrome/browser/signin/easy_unlock_toggle_flow.h
@@ -27,24 +27,22 @@ class EasyUnlockToggleFlow : public OAuth2TokenService::Consumer,
                        const std::string& phone_public_key,
                        bool toggle_enable,
                        const ToggleFlowCallback& callback);
-  virtual ~EasyUnlockToggleFlow();
+  ~EasyUnlockToggleFlow() override;
 
   void Start();
 
   // OAuth2TokenService::Consumer
-  virtual void OnGetTokenSuccess(const OAuth2TokenService::Request* request,
-                                 const std::string& access_token,
-                                 const base::Time& expiration_time) override;
-  virtual void OnGetTokenFailure(const OAuth2TokenService::Request* request,
-                                 const GoogleServiceAuthError& error) override;
+  void OnGetTokenSuccess(const OAuth2TokenService::Request* request,
+                         const std::string& access_token,
+                         const base::Time& expiration_time) override;
+  void OnGetTokenFailure(const OAuth2TokenService::Request* request,
+                         const GoogleServiceAuthError& error) override;
 
   // OAuth2MintTokenFlow::Delegate
-  virtual void OnMintTokenSuccess(const std::string& access_token,
-                                  int time_to_live) override;
-  virtual void OnMintTokenFailure(
-      const GoogleServiceAuthError& error) override;
-  virtual void OnIssueAdviceSuccess(
-      const IssueAdviceInfo& issue_advice) override;
+  void OnMintTokenSuccess(const std::string& access_token,
+                          int time_to_live) override;
+  void OnMintTokenFailure(const GoogleServiceAuthError& error) override;
+  void OnIssueAdviceSuccess(const IssueAdviceInfo& issue_advice) override;
 
  private:
   // Derived OAuth2ApiCallFlow class to make toggle api call after access token