Standardize usage of virtual/override/final in chrome/browser/media

chrome/browser/media/desktop_media_list_ash.h

 // 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.
 
 #ifndef CHROME_BROWSER_MEDIA_DESKTOP_MEDIA_LIST_ASH_H_
 #define CHROME_BROWSER_MEDIA_DESKTOP_MEDIA_LIST_ASH_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 19 matching lines @@
 // Implementation of DesktopMediaList that shows native screens and
 // native windows.
 class DesktopMediaListAsh : public DesktopMediaList {
  public:
   enum SourceTypes {
     SCREENS = 1,
     WINDOWS = 2,
   };
 
   explicit DesktopMediaListAsh(int source_types);
-  virtual ~DesktopMediaListAsh();
+  ~DesktopMediaListAsh() override;
 
   // DesktopMediaList interface.
-  virtual void SetUpdatePeriod(base::TimeDelta period) override;
-  virtual void SetThumbnailSize(const gfx::Size& thumbnail_size) override;
-  virtual void StartUpdating(DesktopMediaListObserver* observer) override;
-  virtual int GetSourceCount() const override;
-  virtual const Source& GetSource(int index) const override;
-  virtual void SetViewDialogWindowId(
-      content::DesktopMediaID::Id dialog_id) override;
+  void SetUpdatePeriod(base::TimeDelta period) override;
+  void SetThumbnailSize(const gfx::Size& thumbnail_size) override;
+  void StartUpdating(DesktopMediaListObserver* observer) override;
+  int GetSourceCount() const override;
+  const Source& GetSource(int index) const override;
+  void SetViewDialogWindowId(content::DesktopMediaID::Id dialog_id) override;
 
  private:
   // Struct used to represent sources list the model gets from the Worker.
   struct SourceDescription {
     SourceDescription(content::DesktopMediaID id, const base::string16& name);
 
     content::DesktopMediaID id;
     base::string16 name;
   };
 
@@ skipping 30 matching lines @@
   std::vector<Source> sources_;
 
   int pending_window_capture_requests_;
 
   base::WeakPtrFactory<DesktopMediaListAsh> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DesktopMediaListAsh);
 };
 
 #endif  // CHROME_BROWSER_MEDIA_DESKTOP_MEDIA_LIST_ASH_H_