Standardize usage of virtual/override/final in components/

components/suggestions/image_manager.h

Index: components/suggestions/image_manager.h
diff --git a/components/suggestions/image_manager.h b/components/suggestions/image_manager.h
index 57ead852dab6cc1a7463ad7210aa9447f5c05ba8..1f7e39257cf5390b16b08dcc2caed1b848418086 100644
--- a/components/suggestions/image_manager.h
+++ b/components/suggestions/image_manager.h
@@ -40,7 +40,7 @@ class ImageManager : public ImageFetcherDelegate {
   ImageManager(scoped_ptr<ImageFetcher> image_fetcher,
                scoped_ptr<leveldb_proto::ProtoDatabase<ImageData> > database,
                const base::FilePath& database_dir);
-  virtual ~ImageManager();
+  ~ImageManager() override;
 
   virtual void Initialize(const SuggestionsProfile& suggestions);
 
@@ -51,7 +51,7 @@ class ImageManager : public ImageFetcherDelegate {
 
  protected:
   // Perform additional tasks when an image has been fetched.
-  virtual void OnImageFetched(const GURL& url, const SkBitmap* bitmap) override;
+  void OnImageFetched(const GURL& url, const SkBitmap* bitmap) override;
 
  private:
   friend class MockImageManager;