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

chrome/browser/ui/sync/one_click_signin_helper.cc

Index: chrome/browser/ui/sync/one_click_signin_helper.cc
diff --git a/chrome/browser/ui/sync/one_click_signin_helper.cc b/chrome/browser/ui/sync/one_click_signin_helper.cc
index b4341f010cb4f546bb5e0c499bd34d7e7601aa1d..f1e9de93dcc9ed8c11d7139799212c06fcf68178 100644
--- a/chrome/browser/ui/sync/one_click_signin_helper.cc
+++ b/chrome/browser/ui/sync/one_click_signin_helper.cc
@@ -117,18 +117,18 @@ class ConfirmEmailDialogDelegate : public TabModalConfirmDialogDelegate {
                              const std::string& last_email,
                              const std::string& email,
                              Callback callback);
-  virtual ~ConfirmEmailDialogDelegate();
+  ~ConfirmEmailDialogDelegate() override;
 
   // TabModalConfirmDialogDelegate:
-  virtual base::string16 GetTitle() override;
-  virtual base::string16 GetDialogMessage() override;
-  virtual base::string16 GetAcceptButtonTitle() override;
-  virtual base::string16 GetCancelButtonTitle() override;
-  virtual base::string16 GetLinkText() const override;
-  virtual void OnAccepted() override;
-  virtual void OnCanceled() override;
-  virtual void OnClosed() override;
-  virtual void OnLinkClicked(WindowOpenDisposition disposition) override;
+  base::string16 GetTitle() override;
+  base::string16 GetDialogMessage() override;
+  base::string16 GetAcceptButtonTitle() override;
+  base::string16 GetCancelButtonTitle() override;
+  base::string16 GetLinkText() const override;
+  void OnAccepted() override;
+  void OnCanceled() override;
+  void OnClosed() override;
+  void OnLinkClicked(WindowOpenDisposition disposition) override;
 
   std::string last_email_;
   std::string email_;
@@ -429,11 +429,11 @@ std::string GetSigninScopedDeviceId(Profile* profile) {
 class CurrentHistoryCleaner : public content::WebContentsObserver {
  public:
   explicit CurrentHistoryCleaner(content::WebContents* contents);
-  virtual ~CurrentHistoryCleaner();
+  ~CurrentHistoryCleaner() override;
 
   // content::WebContentsObserver:
-  virtual void WebContentsDestroyed() override;
-  virtual void DidCommitProvisionalLoadForFrame(
+  void WebContentsDestroyed() override;
+  void DidCommitProvisionalLoadForFrame(
       content::RenderFrameHost* render_frame_host,
       const GURL& url,
       ui::PageTransition transition_type) override;