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

content/browser/loader/resource_scheduler_filter.h

Index: content/browser/loader/resource_scheduler_filter.h
diff --git a/content/browser/loader/resource_scheduler_filter.h b/content/browser/loader/resource_scheduler_filter.h
index f07b4433d10dae26f5186efcd4b1773dfbd5e9cc..0a6c23ab9f3cda727fcd36655cd5ce8a48043d1f 100644
--- a/content/browser/loader/resource_scheduler_filter.h
+++ b/content/browser/loader/resource_scheduler_filter.h
@@ -19,10 +19,10 @@ class ResourceSchedulerFilter : public BrowserMessageFilter {
   explicit ResourceSchedulerFilter(int child_id);
 
   // BrowserMessageFilter methods:
-  virtual bool OnMessageReceived(const IPC::Message& message) override;
+  bool OnMessageReceived(const IPC::Message& message) override;
 
  private:
-  virtual ~ResourceSchedulerFilter();
+  ~ResourceSchedulerFilter() override;
 
   int child_id_;
 };