Standardize usage of virtual/override/final specifiers.

chrome/browser/themes/theme_service_aurax11.cc

 // Copyright 2013 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 "chrome/browser/themes/theme_service_aurax11.h"
 
 #include "base/bind.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/themes/custom_theme_supplier.h"
 #include "chrome/common/pref_names.h"
 #include "ui/gfx/image/image.h"
 #include "ui/native_theme/native_theme_aura.h"
 #include "ui/views/linux_ui/linux_ui.h"
 
 namespace {
 
 class SystemThemeX11 : public CustomThemeSupplier {
  public:
   explicit SystemThemeX11(PrefService* pref_service);
 
   // Overridden from CustomThemeSupplier:
-  virtual void StartUsingTheme() override;
-  virtual void StopUsingTheme() override;
-  virtual bool GetColor(int id, SkColor* color) const override;
-  virtual gfx::Image GetImageNamed(int id) override;
-  virtual bool HasCustomImage(int id) const override;
+  void StartUsingTheme() override;
+  void StopUsingTheme() override;
+  bool GetColor(int id, SkColor* color) const override;
+  gfx::Image GetImageNamed(int id) override;
+  bool HasCustomImage(int id) const override;
 
  private:
-  virtual ~SystemThemeX11();
+  ~SystemThemeX11() override;
 
   // These pointers are not owned by us.
   views::LinuxUI* const linux_ui_;
   PrefService* const pref_service_;
 
   DISALLOW_COPY_AND_ASSIGN(SystemThemeX11);
 };
 
 SystemThemeX11::SystemThemeX11(PrefService* pref_service)
     : CustomThemeSupplier(NATIVE_X11),
@@ skipping 47 matching lines @@
 
 bool ThemeServiceAuraX11::UsingDefaultTheme() const {
   return ThemeService::UsingDefaultTheme() && !UsingSystemTheme();
 }
 
 bool ThemeServiceAuraX11::UsingSystemTheme() const {
   const CustomThemeSupplier* theme_supplier = get_theme_supplier();
   return theme_supplier &&
          theme_supplier->get_theme_type() == CustomThemeSupplier::NATIVE_X11;
 }