Standardize usage of virtual/override/final specifiers.

chrome/browser/external_protocol/external_protocol_handler_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/external_protocol/external_protocol_handler.h"
 
 #include "base/message_loop/message_loop.h"
 #include "content/public/test/test_browser_thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 85 matching lines @@
   bool has_prompted_;
   bool has_blocked_;
 };
 
 class ExternalProtocolHandlerTest : public testing::Test {
  protected:
   ExternalProtocolHandlerTest()
       : ui_thread_(BrowserThread::UI, base::MessageLoop::current()),
         file_thread_(BrowserThread::FILE) {}
 
-  virtual void SetUp() {
-    file_thread_.Start();
-  }
+  void SetUp() override { file_thread_.Start(); }
 
-  virtual void TearDown() {
+  void TearDown() override {
     // Ensure that g_accept_requests gets set back to true after test execution.
     ExternalProtocolHandler::PermitLaunchUrl();
   }
 
   void DoTest(ExternalProtocolHandler::BlockState block_state,
               ShellIntegration::DefaultWebClientState os_state,
               bool should_prompt, bool should_launch, bool should_block) {
     GURL url("mailto:test@test.com");
     ASSERT_FALSE(delegate_.has_prompted());
     ASSERT_FALSE(delegate_.has_launched());
@@ skipping 63 matching lines @@
   DoTest(ExternalProtocolHandler::UNKNOWN,
          ShellIntegration::NOT_DEFAULT,
          true, false, false);
 }
 
 TEST_F(ExternalProtocolHandlerTest, TestLaunchSchemeUnknownChromeUnknown) {
   DoTest(ExternalProtocolHandler::UNKNOWN,
          ShellIntegration::UNKNOWN_DEFAULT,
          true, false, false);
 }