Standardize usage of virtual/override/final in chrome/

chrome/test/nacl/pnacl_header_test.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_TEST_NACL_PNACL_HEADER_TEST_H_
 #define CHROME_TEST_NACL_PNACL_HEADER_TEST_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/test/base/in_process_browser_test.h"
@@ skipping 11 matching lines @@
 }
 }
 
 using content::ResourceDispatcherHostDelegate;
 
 class TestDispatcherHostDelegate : public ResourceDispatcherHostDelegate {
  public:
   explicit TestDispatcherHostDelegate()
       : ResourceDispatcherHostDelegate(), found_pnacl_header_(false) {}
 
-  virtual ~TestDispatcherHostDelegate() {}
+  ~TestDispatcherHostDelegate() override {}
 
-  virtual void RequestBeginning(
+  void RequestBeginning(
       net::URLRequest* request,
       content::ResourceContext* resource_context,
       content::AppCacheService* appcache_service,
       content::ResourceType resource_type,
       ScopedVector<content::ResourceThrottle>* throttles) override;
 
   bool found_pnacl_header() const { return found_pnacl_header_; }
 
  private:
   bool found_pnacl_header_;
@@ skipping 19 matching lines @@
   scoped_ptr<net::test_server::HttpResponse> WatchForPexeFetch(
       const net::test_server::HttpRequest& request);
 
   int noncors_loads_;
   int cors_loads_;
   TestDispatcherHostDelegate test_delegate_;
   DISALLOW_COPY_AND_ASSIGN(PnaclHeaderTest);
 };
 
 #endif  // CHROME_TEST_NACL_PNACL_HEADER_TEST_H_