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

chrome/browser/task_manager/background_information.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 "chrome/browser/task_manager/background_information.h"
 
 #include "base/i18n/rtl.h"
 #include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/background/background_contents_service.h"
@@ skipping 24 matching lines @@
 using content::RenderViewHost;
 using content::WebContents;
 using extensions::Extension;
 
 namespace task_manager {
 
 class BackgroundContentsResource : public RendererResource {
  public:
   BackgroundContentsResource(BackgroundContents* background_contents,
                              const base::string16& application_name);
-  virtual ~BackgroundContentsResource();
+  ~BackgroundContentsResource() override;
 
   // Resource methods:
-  virtual base::string16 GetTitle() const override;
-  virtual gfx::ImageSkia GetIcon() const override;
+  base::string16 GetTitle() const override;
+  gfx::ImageSkia GetIcon() const override;
 
   const base::string16& application_name() const { return application_name_; }
 
  private:
   BackgroundContents* background_contents_;
 
   base::string16 application_name_;
 
   // The icon painted for BackgroundContents.
   // TODO(atwilson): Use the favicon when there's a way to get the favicon for
@@ skipping 104 matching lines @@
         application_name = base::UTF8ToUTF16(extension->name());
       return scoped_ptr<RendererResource>(
           new BackgroundContentsResource(*iterator, application_name));
     }
   }
   NOTREACHED();
   return scoped_ptr<RendererResource>();
 }
 
 }  // namespace task_manager