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

chrome/browser/content_settings/content_settings_custom_extension_provider.h

Index: chrome/browser/content_settings/content_settings_custom_extension_provider.h
diff --git a/chrome/browser/content_settings/content_settings_custom_extension_provider.h b/chrome/browser/content_settings/content_settings_custom_extension_provider.h
index 27a32879fd865a4fe47cacf2eb5a65143961c7f5..4107803ef11885f51a651975ffb1d420d80a6b77 100644
--- a/chrome/browser/content_settings/content_settings_custom_extension_provider.h
+++ b/chrome/browser/content_settings/content_settings_custom_extension_provider.h
@@ -21,29 +21,27 @@ class CustomExtensionProvider : public ObservableProvider,
                               extensions_settings,
                           bool incognito);
 
-  virtual ~CustomExtensionProvider();
+  ~CustomExtensionProvider() override;
 
   // ProviderInterface methods:
-  virtual RuleIterator* GetRuleIterator(
-      ContentSettingsType content_type,
-      const ResourceIdentifier& resource_identifier,
-      bool incognito) const override;
+  RuleIterator* GetRuleIterator(ContentSettingsType content_type,
+                                const ResourceIdentifier& resource_identifier,
+                                bool incognito) const override;
 
-  virtual bool SetWebsiteSetting(
-      const ContentSettingsPattern& primary_pattern,
-      const ContentSettingsPattern& secondary_pattern,
-      ContentSettingsType content_type,
-      const ResourceIdentifier& resource_identifier,
-      base::Value* value) override;
+  bool SetWebsiteSetting(const ContentSettingsPattern& primary_pattern,
+                         const ContentSettingsPattern& secondary_pattern,
+                         ContentSettingsType content_type,
+                         const ResourceIdentifier& resource_identifier,
+                         base::Value* value) override;
 
-  virtual void ClearAllContentSettingsRules(ContentSettingsType content_type)
-      override {}
+  void ClearAllContentSettingsRules(ContentSettingsType content_type) override {
+  }
 
-  virtual void ShutdownOnUIThread() override;
+  void ShutdownOnUIThread() override;
 
   // extensions::ContentSettingsStore::Observer methods:
-  virtual void OnContentSettingChanged(const std::string& extension_id,
-                                       bool incognito) override;
+  void OnContentSettingChanged(const std::string& extension_id,
+                               bool incognito) override;
 
  private:
   // Specifies whether this provider manages settings for incognito or regular