Standardize usage of virtual/override/final specifiers.

ui/app_list/views/search_box_view.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/app_list/views/search_box_view.h"
 
 #include <algorithm>
 
 #include "ui/app_list/app_list_constants.h"
 #include "ui/app_list/app_list_model.h"
@@ skipping 31 matching lines @@
 const int kBackgroundBorderWidth = 1;
 const int kBackgroundBorderBottomWidth = 1;
 const int kBackgroundBorderCornerRadius = 2;
 const SkColor kBackgroundBorderColor = SkColorSetRGB(0xEE, 0xEE, 0xEE);
 const SkColor kBackgroundBorderBottomColor = SkColorSetRGB(0xCC, 0xCC, 0xCC);
 
 // A background that paints a solid white rounded rect with a thin grey border.
 class ExperimentalSearchBoxBackground : public views::Background {
  public:
   ExperimentalSearchBoxBackground() {}
-  virtual ~ExperimentalSearchBoxBackground() {}
+  ~ExperimentalSearchBoxBackground() override {}
 
  private:
   // views::Background overrides:
-  virtual void Paint(gfx::Canvas* canvas, views::View* view) const override {
+  void Paint(gfx::Canvas* canvas, views::View* view) const override {
     gfx::Rect bounds = view->GetContentsBounds();
 
     SkPaint paint;
     paint.setFlags(SkPaint::kAntiAlias_Flag);
     paint.setColor(kBackgroundBorderColor);
     canvas->DrawRoundRect(bounds, kBackgroundBorderCornerRadius, paint);
     bounds.Inset(kBackgroundBorderWidth,
                  kBackgroundBorderWidth,
                  kBackgroundBorderWidth,
                  0);
@@ skipping 200 matching lines @@
   NotifyQueryChanged();
 }
 
 void SearchBoxView::OnSpeechRecognitionStateChanged(
     SpeechRecognitionState new_state) {
   SpeechRecognitionButtonPropChanged();
   SchedulePaint();
 }
 
 }  // namespace app_list