Standardize usage of virtual/override/final in net/

net/proxy/proxy_resolver_perftest.cc

 // Copyright (c) 2012 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.
 
 #include "base/base_paths.h"
 #include "base/compiler_specific.h"
 #include "base/files/file_util.h"
 #include "base/path_service.h"
 #include "base/strings/string_util.h"
 #include "base/test/perf_time_logger.h"
@@ skipping 181 matching lines @@
   net::ProxyResolverMac resolver;
   PacPerfSuiteRunner runner(&resolver, "ProxyResolverMac");
   runner.RunAllTests();
 }
 #endif
 
 class MockJSBindings : public net::ProxyResolverV8::JSBindings {
  public:
   MockJSBindings() {}
 
-  virtual void Alert(const base::string16& message) override {
-    CHECK(false);
-  }
+  void Alert(const base::string16& message) override { CHECK(false); }
 
-  virtual bool ResolveDns(const std::string& host,
-                          ResolveDnsOperation op,
-                          std::string* output,
-                          bool* terminate) override {
+  bool ResolveDns(const std::string& host,
+                  ResolveDnsOperation op,
+                  std::string* output,
+                  bool* terminate) override {
     CHECK(false);
     return false;
   }
 
-  virtual void OnError(int line_number,
-                       const base::string16& message) override {
+  void OnError(int line_number, const base::string16& message) override {
     CHECK(false);
   }
 };
 
 TEST(ProxyResolverPerfTest, ProxyResolverV8) {
   net::ProxyResolverV8::EnsureIsolateCreated();
 
   MockJSBindings js_bindings;
   net::ProxyResolverV8 resolver;
   resolver.set_js_bindings(&js_bindings);
   PacPerfSuiteRunner runner(&resolver, "ProxyResolverV8");
   runner.RunAllTests();
 }