Standardize usage of virtual/override/final specifiers.

chrome/browser/media/webrtc_log_util_unittest.cc

 // Copyright 2014 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/files/file_enumerator.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/message_loop/message_loop.h"
 #include "base/time/time.h"
 #include "chrome/browser/media/webrtc_log_util.h"
 #include "content/public/test/test_browser_thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 const int kExpectedDaysToKeepLogFiles = 5;
 
 class WebRtcLogUtilTest : public testing::Test {
  public:
   WebRtcLogUtilTest()
       : file_thread_(content::BrowserThread::FILE, &message_loop_) {}
 
-  virtual void SetUp() {
+  void SetUp() override {
     // Create three files. One with modified date as of now, one with date one
     // day younger than the keep limit, one with date one day older than the
     // limit. The two former are expected to be kept and the last to be deleted
     // when deleting old logs.
     ASSERT_TRUE(dir_.CreateUniqueTempDir());
     base::FilePath file;
     ASSERT_TRUE(CreateTemporaryFileInDir(dir_.path(), &file));
     ASSERT_TRUE(CreateTemporaryFileInDir(dir_.path(), &file));
     base::Time time_expect_to_keep =
         base::Time::Now() -
@@ skipping 28 matching lines @@
   VerifyFiles(2);
 }
 
 TEST_F(WebRtcLogUtilTest, DeleteOldAndRecentWebRtcLogFiles) {
   base::Time time_begin_delete =
       base::Time::Now() - base::TimeDelta::FromDays(1);
   WebRtcLogUtil::DeleteOldAndRecentWebRtcLogFiles(dir_.path(),
                                                   time_begin_delete);
   VerifyFiles(1);
 }