Standardize usage of virtual/override/final specifiers.

chrome/browser/internal_auth_unittest.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 "chrome/browser/internal_auth.h"
 
 #include <algorithm>
 
 #include "base/lazy_instance.h"
 #include "base/message_loop/message_loop.h"
 #include "base/time/time.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace chrome {
 
 class InternalAuthTest : public ::testing::Test {
  public:
   InternalAuthTest() {
     long_string_ = "seed";
     for (int i = 20; i--;)
       long_string_ += long_string_;
   }
-  virtual ~InternalAuthTest() {}
+  ~InternalAuthTest() override {}
 
-  virtual void SetUp() {
-  }
+  void SetUp() override {}
 
-  virtual void TearDown() {
-  }
+  void TearDown() override {}
 
   base::MessageLoop message_loop_;
   std::string long_string_;
 };
 
 TEST_F(InternalAuthTest, BasicGeneration) {
   std::map<std::string, std::string> map;
   map["key"] = "value";
   std::string token = InternalAuthGeneration::GeneratePassport(
       "zapata", map);
@@ skipping 139 matching lines @@
 
   token = InternalAuthGeneration::GeneratePassport("zapata", map);
   ASSERT_GT(token.size(), 10u);
   for (int i = 20; i--;)
     InternalAuthGeneration::GenerateNewKey();
   // Passport should not survive series of key changes.
   ASSERT_FALSE(InternalAuthVerification::VerifyPassport(token, "zapata", map));
 }
 
 }  // namespace chrome