Standardize usage of virtual/override/final in components/

components/omnibox/search_provider.h

Index: components/omnibox/search_provider.h
diff --git a/components/omnibox/search_provider.h b/components/omnibox/search_provider.h
index 83eeaa33d8aa19a38d5c5d070c9b08bd0e97d27c..19696bc606bdeeb2e4971e92394c45c4f607ffea 100644
--- a/components/omnibox/search_provider.h
+++ b/components/omnibox/search_provider.h
@@ -65,7 +65,7 @@ class SearchProvider : public BaseSearchProvider,
   void RegisterDisplayedAnswers(const AutocompleteResult& result);
 
   // AutocompleteProvider:
-  virtual void ResetSession() override;
+  void ResetSession() override;
 
   // This URL may be sent with suggest requests; see comments on CanSendURL().
   void set_current_page_url(const GURL& current_page_url) {
@@ -73,7 +73,7 @@ class SearchProvider : public BaseSearchProvider,
   }
 
  protected:
-  virtual ~SearchProvider();
+  ~SearchProvider() override;
 
  private:
   friend class SearchProviderTest;
@@ -158,19 +158,18 @@ class SearchProvider : public BaseSearchProvider,
   static ACMatches::iterator FindTopMatch(ACMatches* matches);
 
   // AutocompleteProvider:
-  virtual void Start(const AutocompleteInput& input,
-                     bool minimal_changes) override;
-  virtual void Stop(bool clear_cached_results) override;
+  void Start(const AutocompleteInput& input, bool minimal_changes) override;
+  void Stop(bool clear_cached_results) override;
 
   // BaseSearchProvider:
-  virtual const TemplateURL* GetTemplateURL(bool is_keyword) const override;
-  virtual const AutocompleteInput GetInput(bool is_keyword) const override;
-  virtual bool ShouldAppendExtraParams(
+  const TemplateURL* GetTemplateURL(bool is_keyword) const override;
+  const AutocompleteInput GetInput(bool is_keyword) const override;
+  bool ShouldAppendExtraParams(
       const SearchSuggestionParser::SuggestResult& result) const override;
-  virtual void RecordDeletionResult(bool success) override;
+  void RecordDeletionResult(bool success) override;
 
   // net::URLFetcherDelegate:
-  virtual void OnURLFetchComplete(const net::URLFetcher* source) override;
+  void OnURLFetchComplete(const net::URLFetcher* source) override;
 
   // Stops the suggest query.
   // NOTE: This does not update |done_|.  Callers must do so.