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

chrome/browser/bitmap_fetcher/bitmap_fetcher_service.h

 // 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.
 #ifndef CHROME_BROWSER_BITMAP_FETCHER_BITMAP_FETCHER_SERVICE_H_
 #define CHROME_BROWSER_BITMAP_FETCHER_BITMAP_FETCHER_SERVICE_H_
 
 #include "base/compiler_specific.h"
 #include "base/containers/mru_cache.h"
 #include "base/containers/scoped_ptr_hash_map.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 24 matching lines @@
    public:
     virtual ~Observer() {}
 
     // Called whenever the image changes. Called with an empty image if the
     // fetch failed or the request ended for any reason.
     virtual void OnImageChanged(RequestId request_id,
                                 const SkBitmap& answers_image) = 0;
   };
 
   explicit BitmapFetcherService(content::BrowserContext* context);
-  virtual ~BitmapFetcherService();
+  ~BitmapFetcherService() override;
 
   // Cancels a request, if it is still in-flight.
   void CancelRequest(RequestId requestId);
 
   // Requests a new image. Will either trigger download or satisfy from cache.
   // Takes ownership of |observer|. If there are too many outstanding requests,
   // the request will fail and |observer| will be called to signal failure.
   // Otherwise, |observer| will be called with either the cached image or the
   // downloaded one.
   // NOTE: The observer might be called back synchronously from RequestImage if
@@ skipping 18 matching lines @@
   const chrome::BitmapFetcher* EnsureFetcherForUrl(const GURL& url);
 
   // Find a fetcher with a given |url|. Return NULL if none is found.
   const chrome::BitmapFetcher* FindFetcherForUrl(const GURL& url);
 
   // Remove |fetcher| from list of active fetchers. |fetcher| MUST be part of
   // the list.
   void RemoveFetcher(const chrome::BitmapFetcher* fetcher);
 
   // BitmapFetcherDelegate implementation.
-  virtual void OnFetchComplete(const GURL url, const SkBitmap* bitmap) override;
+  void OnFetchComplete(const GURL url, const SkBitmap* bitmap) override;
 
   // Currently active image fetchers.
   BitmapFetchers active_fetchers_;
 
   // Currently active requests.
   ScopedVector<BitmapFetcherRequest> requests_;
 
   // Cache of retrieved images.
   struct CacheEntry {
     CacheEntry();
     ~CacheEntry();
 
     scoped_ptr<const SkBitmap> bitmap;
   };
   base::OwningMRUCache<GURL, CacheEntry*> cache_;
 
   // Current request ID to be used.
   int current_request_id_;
 
   // Browser context this service is active for.
   content::BrowserContext* context_;
 
   DISALLOW_COPY_AND_ASSIGN(BitmapFetcherService);
 };
 
 #endif  // CHROME_BROWSER_BITMAP_FETCHER_BITMAP_FETCHER_SERVICE_H_