Standardize usage of virtual/override/final specifiers.

ash/system/audio/volume_view.cc

 // Copyright 2014 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 "ash/system/audio/volume_view.h"
 
 #include "ash/ash_constants.h"
 #include "ash/shell.h"
 #include "ash/system/audio/tray_audio.h"
 #include "ash/system/audio/tray_audio_delegate.h"
@@ skipping 32 matching lines @@
                 system::TrayAudioDelegate* audio_delegate)
       : views::ToggleImageButton(listener),
         audio_delegate_(audio_delegate),
         image_index_(-1) {
     SetImageAlignment(ALIGN_CENTER, ALIGN_MIDDLE);
     image_ = ui::ResourceBundle::GetSharedInstance().GetImageNamed(
         IDR_AURA_UBER_TRAY_VOLUME_LEVELS);
     Update();
   }
 
-  virtual ~VolumeButton() {}
+  ~VolumeButton() override {}
 
   void Update() {
     float level =
         static_cast<float>(audio_delegate_->GetOutputVolumeLevel()) / 100.0f;
     int image_index = audio_delegate_->IsOutputAudioMuted() ?
         0 : (level == 1.0 ?
              kVolumeLevels :
              std::max(1, int(std::ceil(level * (kVolumeLevels - 1)))));
     if (image_index != image_index_) {
       gfx::Rect region(0, image_index * kVolumeImageHeight,
                        kVolumeImageWidth, kVolumeImageHeight);
       gfx::ImageSkia image_skia = gfx::ImageSkiaOperations::ExtractSubset(
           *(image_.ToImageSkia()), region);
       SetImage(views::CustomButton::STATE_NORMAL, &image_skia);
       image_index_ = image_index;
     }
     SchedulePaint();
   }
 
  private:
   // Overridden from views::View.
-  virtual gfx::Size GetPreferredSize() const override {
+  gfx::Size GetPreferredSize() const override {
     gfx::Size size = views::ToggleImageButton::GetPreferredSize();
     size.set_height(kTrayPopupItemHeight);
     return size;
   }
 
   system::TrayAudioDelegate* audio_delegate_;
   gfx::Image image_;
   int image_index_;
 
   DISALLOW_COPY_AND_ASSIGN(VolumeButton);
 };
 
 class VolumeSlider : public views::Slider {
  public:
   VolumeSlider(views::SliderListener* listener,
                system::TrayAudioDelegate* audio_delegate)
       : views::Slider(listener, views::Slider::HORIZONTAL),
         audio_delegate_(audio_delegate) {
     set_focus_border_color(kFocusBorderColor);
     SetValue(
         static_cast<float>(audio_delegate_->GetOutputVolumeLevel()) / 100.0f);
     SetAccessibleName(
             ui::ResourceBundle::GetSharedInstance().GetLocalizedString(
                 IDS_ASH_STATUS_TRAY_VOLUME));
     Update();
   }
-  virtual ~VolumeSlider() {}
+  ~VolumeSlider() override {}
 
   void Update() {
     UpdateState(!audio_delegate_->IsOutputAudioMuted());
   }
 
  private:
   system::TrayAudioDelegate* audio_delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(VolumeSlider);
 };
 
 // Vertical bar separator that can be placed on the VolumeView.
 class BarSeparator : public views::View {
  public:
   BarSeparator() {}
-  virtual ~BarSeparator() {}
+  ~BarSeparator() override {}
 
   // Overriden from views::View.
-  virtual gfx::Size GetPreferredSize() const override {
+  gfx::Size GetPreferredSize() const override {
     return gfx::Size(kBarSeparatorWidth, kBarSeparatorHeight);
   }
 
  private:
-  virtual void OnPaint(gfx::Canvas* canvas) override {
+  void OnPaint(gfx::Canvas* canvas) override {
     canvas->FillRect(gfx::Rect(width() / 2, 0, 1, height()),
                      kButtonStrokeColor);
   }
 
   DISALLOW_COPY_AND_ASSIGN(BarSeparator);
 };
 
 VolumeView::VolumeView(SystemTrayItem* owner,
                        system::TrayAudioDelegate* audio_delegate,
                        bool is_default_view)
@@ skipping 183 matching lines @@
 
 bool VolumeView::PerformAction(const ui::Event& event) {
   if (!more_->visible())
     return false;
   owner_->TransitionDetailedView();
   return true;
 }
 
 }  // namespace tray
 }  // namespace ash