Standardize usage of virtual/override/final specifiers.

ui/views/focus/external_focus_tracker.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_VIEWS_FOCUS_EXTERNAL_FOCUS_TRACKER_H_
 #define UI_VIEWS_FOCUS_EXTERNAL_FOCUS_TRACKER_H_
 
 #include "base/compiler_specific.h"
 #include "ui/views/focus/focus_manager.h"
 
@@ skipping 11 matching lines @@
 // SetFocusManager(NULL) first.
 //
 // Typical use: When a view is added to the view hierarchy, it instantiates an
 // ExternalFocusTracker and passes in itself and its focus manager. Then,
 // when that view wants to return focus to the last focused view which is not
 // itself and not a descandant of itself, (usually when it is being closed)
 // it calls FocusLastFocusedExternalView.
 class VIEWS_EXPORT ExternalFocusTracker : public FocusChangeListener {
  public:
   ExternalFocusTracker(View* parent_view, FocusManager* focus_manager);
-  virtual ~ExternalFocusTracker();
+  ~ExternalFocusTracker() override;
 
   // FocusChangeListener:
-  virtual void OnWillChangeFocus(View* focused_before,
-                                 View* focused_now) override;
-  virtual void OnDidChangeFocus(View* focused_before,
-                                View* focused_now) override;
+  void OnWillChangeFocus(View* focused_before, View* focused_now) override;
+  void OnDidChangeFocus(View* focused_before, View* focused_now) override;
 
   // Focuses last focused view which is not a child of parent view and is not
   // parent view itself. Returns true if focus for a view was requested, false
   // otherwise.
   void FocusLastFocusedExternalView();
 
   // Sets the focus manager whose focus we are tracking. |focus_manager| can
   // be NULL, but no focus changes will be tracked. This is useful if the focus
   // manager went away, but you might later want to start tracking with a new
   // manager later, or call FocusLastFocusedExternalView to focus the previous
@@ skipping 22 matching lines @@
   // The parent view of views which we should not track focus changes to. We
   // also do not track changes to parent_view_ itself.
   View* parent_view_;
 
   DISALLOW_COPY_AND_ASSIGN(ExternalFocusTracker);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_FOCUS_EXTERNAL_FOCUS_TRACKER_H_