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

content/browser/quota_dispatcher_host.h

Index: content/browser/quota_dispatcher_host.h
diff --git a/content/browser/quota_dispatcher_host.h b/content/browser/quota_dispatcher_host.h
index 79ea104dd79c03aa4fd0b366d5e2b1d430456ff7..8a30f229f81c64f104d19a2b514f18109484261a 100644
--- a/content/browser/quota_dispatcher_host.h
+++ b/content/browser/quota_dispatcher_host.h
@@ -31,10 +31,10 @@ class QuotaDispatcherHost : public BrowserMessageFilter {
                       QuotaPermissionContext* permission_context);
 
   // BrowserMessageFilter:
-  virtual bool OnMessageReceived(const IPC::Message& message) override;
+  bool OnMessageReceived(const IPC::Message& message) override;
 
  protected:
-  virtual ~QuotaDispatcherHost();
+  ~QuotaDispatcherHost() override;
 
  private:
   class RequestDispatcher;