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

chrome/browser/autocomplete/zero_suggest_provider.h

Index: chrome/browser/autocomplete/zero_suggest_provider.h
diff --git a/chrome/browser/autocomplete/zero_suggest_provider.h b/chrome/browser/autocomplete/zero_suggest_provider.h
index c10a622cbf2a101afbfd7152d4edfdb55307baa7..aaeaa6f88251564efd9f2933ddc06e6b178439b0 100644
--- a/chrome/browser/autocomplete/zero_suggest_provider.h
+++ b/chrome/browser/autocomplete/zero_suggest_provider.h
@@ -57,31 +57,30 @@ class ZeroSuggestProvider : public BaseSearchProvider,
   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
 
   // AutocompleteProvider:
-  virtual void Start(const AutocompleteInput& input,
-                     bool minimal_changes) override;
-  virtual void Stop(bool clear_cached_results) override;
-  virtual void DeleteMatch(const AutocompleteMatch& match) override;
-  virtual void AddProviderInfo(ProvidersInfo* provider_info) const override;
+  void Start(const AutocompleteInput& input, bool minimal_changes) override;
+  void Stop(bool clear_cached_results) override;
+  void DeleteMatch(const AutocompleteMatch& match) override;
+  void AddProviderInfo(ProvidersInfo* provider_info) const override;
 
   // Sets |field_trial_triggered_| to false.
-  virtual void ResetSession() override;
+  void ResetSession() override;
 
  private:
   ZeroSuggestProvider(AutocompleteProviderListener* listener,
                       TemplateURLService* template_url_service,
                       Profile* profile);
 
-  virtual ~ZeroSuggestProvider();
+  ~ZeroSuggestProvider() 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;
 
   // Optionally, cache the received |json_data| and return true if we want
   // to stop processing results at this point. The |parsed_data| is the parsed