Standardize usage of virtual/override/final specifiers.

ui/views/background.cc

 // Copyright (c) 2012 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.
 
 #include "ui/views/background.h"
 
 #include "base/logging.h"
 #include "skia/ext/skia_utils_win.h"
 #include "third_party/skia/include/core/SkPaint.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/color_utils.h"
 #include "ui/views/painter.h"
 #include "ui/views/view.h"
 
 namespace views {
 
 // SolidBackground is a trivial Background implementation that fills the
 // background in a solid color.
 class SolidBackground : public Background {
  public:
   explicit SolidBackground(SkColor color) {
     SetNativeControlColor(color);
   }
 
-  virtual void Paint(gfx::Canvas* canvas, View* view) const override {
+  void Paint(gfx::Canvas* canvas, View* view) const override {
     // Fill the background. Note that we don't constrain to the bounds as
     // canvas is already clipped for us.
     canvas->DrawColor(get_color());
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SolidBackground);
 };
 
 class BackgroundPainter : public Background {
  public:
   BackgroundPainter(bool owns_painter, Painter* painter)
       : owns_painter_(owns_painter), painter_(painter) {
     DCHECK(painter);
   }
 
-  virtual ~BackgroundPainter() {
+  ~BackgroundPainter() override {
     if (owns_painter_)
       delete painter_;
   }
 
-
-  virtual void Paint(gfx::Canvas* canvas, View* view) const override {
+  void Paint(gfx::Canvas* canvas, View* view) const override {
     Painter::PaintPainterAt(canvas, painter_, view->GetLocalBounds());
   }
 
  private:
   bool owns_painter_;
   Painter* painter_;
 
   DISALLOW_COPY_AND_ASSIGN(BackgroundPainter);
 };
 
@@ skipping 62 matching lines @@
   return background;
 }
 
 //static
 Background* Background::CreateBackgroundPainter(bool owns_painter,
                                                 Painter* painter) {
   return new BackgroundPainter(owns_painter, painter);
 }
 
 }  // namespace views