Standardize usage of virtual/override/final specifiers.

chrome/browser/browsing_data/browsing_data_helper_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/browsing_data/browsing_data_helper.h"
 
 #include "base/strings/stringprintf.h"
 #include "chrome/common/url_constants.h"
 #include "extensions/common/constants.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 18 matching lines @@
 const GURL kOriginExt(kTestOriginExt);
 const GURL kOriginDevTools(kTestOriginDevTools);
 
 const int kExtension = BrowsingDataHelper::EXTENSION;
 const int kProtected = BrowsingDataHelper::PROTECTED_WEB;
 const int kUnprotected = BrowsingDataHelper::UNPROTECTED_WEB;
 
 class BrowsingDataHelperTest : public testing::Test {
  public:
   BrowsingDataHelperTest() {}
-  virtual ~BrowsingDataHelperTest() {}
+  ~BrowsingDataHelperTest() override {}
 
   bool IsWebScheme(const std::string& scheme) {
     GURL test(scheme + "://example.com");
     return (BrowsingDataHelper::HasWebScheme(test) &&
             BrowsingDataHelper::IsWebScheme(scheme));
   }
 
   bool IsExtensionScheme(const std::string& scheme) {
     GURL test(scheme + "://example.com");
     return (BrowsingDataHelper::HasExtensionScheme(test) &&
@@ skipping 118 matching lines @@
   EXPECT_TRUE(Match(kOriginExt, kExtension, NULL));
   EXPECT_FALSE(Match(kOriginExt, kUnprotected, NULL));
   EXPECT_FALSE(Match(kOriginExt, kProtected, NULL));
 
   EXPECT_FALSE(Match(kOriginDevTools, kExtension, NULL));
   EXPECT_FALSE(Match(kOriginDevTools, kUnprotected, NULL));
   EXPECT_FALSE(Match(kOriginDevTools, kProtected, NULL));
 }
 
 }  // namespace