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

chrome/browser/signin/signin_global_error.h

Index: chrome/browser/signin/signin_global_error.h
diff --git a/chrome/browser/signin/signin_global_error.h b/chrome/browser/signin/signin_global_error.h
index 673b03bec4cefa68d829ab8642c91631b5135a06..86846c80437885952ed3449185e4b724959ef9f3 100644
--- a/chrome/browser/signin/signin_global_error.h
+++ b/chrome/browser/signin/signin_global_error.h
@@ -22,7 +22,7 @@ class SigninGlobalError : public GlobalErrorWithStandardBubble,
  public:
   SigninGlobalError(SigninErrorController* error_controller,
                     Profile* profile);
-  virtual ~SigninGlobalError();
+  ~SigninGlobalError() override;
 
   // Returns true if there is an authentication error.
   bool HasError();
@@ -37,24 +37,24 @@ class SigninGlobalError : public GlobalErrorWithStandardBubble,
   FRIEND_TEST_ALL_PREFIXES(SigninGlobalErrorTest, AuthStatusEnumerateAllErrors);
 
   // KeyedService:
-  virtual void Shutdown() override;
+  void Shutdown() override;
 
   // GlobalErrorWithStandardBubble:
-  virtual bool HasMenuItem() override;
-  virtual int MenuItemCommandID() override;
-  virtual base::string16 MenuItemLabel() override;
-  virtual void ExecuteMenuItem(Browser* browser) override;
-  virtual bool HasBubbleView() override;
-  virtual base::string16 GetBubbleViewTitle() override;
-  virtual std::vector<base::string16> GetBubbleViewMessages() override;
-  virtual base::string16 GetBubbleViewAcceptButtonLabel() override;
-  virtual base::string16 GetBubbleViewCancelButtonLabel() override;
-  virtual void OnBubbleViewDidClose(Browser* browser) override;
-  virtual void BubbleViewAcceptButtonPressed(Browser* browser) override;
-  virtual void BubbleViewCancelButtonPressed(Browser* browser) override;
+  bool HasMenuItem() override;
+  int MenuItemCommandID() override;
+  base::string16 MenuItemLabel() override;
+  void ExecuteMenuItem(Browser* browser) override;
+  bool HasBubbleView() override;
+  base::string16 GetBubbleViewTitle() override;
+  std::vector<base::string16> GetBubbleViewMessages() override;
+  base::string16 GetBubbleViewAcceptButtonLabel() override;
+  base::string16 GetBubbleViewCancelButtonLabel() override;
+  void OnBubbleViewDidClose(Browser* browser) override;
+  void BubbleViewAcceptButtonPressed(Browser* browser) override;
+  void BubbleViewCancelButtonPressed(Browser* browser) override;
 
   // SigninErrorController::Observer:
-  virtual void OnErrorChanged() override;
+  void OnErrorChanged() override;
 
   // The Profile this service belongs to.
   Profile* profile_;