Update {virtual,override,final} to follow C++11 style in chrome/browser/chromeos/input_method.

chrome/browser/chromeos/input_method/accessibility.h

Index: chrome/browser/chromeos/input_method/accessibility.h
diff --git a/chrome/browser/chromeos/input_method/accessibility.h b/chrome/browser/chromeos/input_method/accessibility.h
index 0ad3692f218163fb92d39dead44ef92319c5df1b..d295d28b7a6c6c99cb711acdd2a17cc8eeafbb08 100644
--- a/chrome/browser/chromeos/input_method/accessibility.h
+++ b/chrome/browser/chromeos/input_method/accessibility.h
@@ -15,12 +15,11 @@ class Accessibility
     : public InputMethodManager::Observer {
  public:
   explicit Accessibility(InputMethodManager* imm);
-  virtual ~Accessibility();
+  ~Accessibility() override;
 
  private:
   // InputMethodManager::Observer implementation.
-  virtual void InputMethodChanged(InputMethodManager* imm,
-                                  bool show_message) override;
+  void InputMethodChanged(InputMethodManager* imm, bool show_message) override;
   InputMethodManager* imm_;
 
   DISALLOW_COPY_AND_ASSIGN(Accessibility);