Standardize usage of virtual/override/final in chrome/browser/media

chrome/browser/media/chrome_webrtc_audio_quality_browsertest.cc

 // Copyright 2013 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 <ctime>
 
 #include "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/path_service.h"
 #include "base/process/launch.h"
@@ skipping 91 matching lines @@
 // 4. In the Listen tab for the mix device, check the 'listen to this device'
 //    checkbox. Ensure the mix device is the default recording device.
 // 5. Launch chrome and try playing a video with sound. You should see
 //    in the volume meter for the mix device. Configure the mix device to have
 //    50 / 100 in level. Also go into the playback tab, right-click Speakers,
 //    and set that level to 50 / 100. Otherwise you will get distortion in
 //    the recording.
 class WebRtcAudioQualityBrowserTest : public WebRtcTestBase {
  public:
   WebRtcAudioQualityBrowserTest() {}
-  virtual void SetUpInProcessBrowserTestFixture() override {
+  void SetUpInProcessBrowserTestFixture() override {
     DetectErrorsInJavaScript();  // Look for errors in our rather complex js.
   }
 
-  virtual void SetUpCommandLine(CommandLine* command_line) override {
+  void SetUpCommandLine(CommandLine* command_line) override {
     // This test expects real device handling and requires a real webcam / audio
     // device; it will not work with fake devices.
     EXPECT_FALSE(command_line->HasSwitch(
         switches::kUseFakeDeviceForMediaStream));
     EXPECT_FALSE(command_line->HasSwitch(
         switches::kUseFakeUIForMediaStream));
   }
 
   void AddAudioFile(const std::string& input_file_relative_url,
                     content::WebContents* tab_contents) {
@@ skipping 342 matching lines @@
       test::GetReferenceFilesDir().Append(kReferenceFile);
   ASSERT_TRUE(RunPesq(reference_file_in_test_dir, trimmed_recording, 16000,
                       &raw_mos, &mos_lqo));
 
   perf_test::PrintResult("audio_pesq", "", "raw_mos", raw_mos, "score", true);
   perf_test::PrintResult("audio_pesq", "", "mos_lqo", mos_lqo, "score", true);
 
   EXPECT_TRUE(base::DeleteFile(recording, false));
   EXPECT_TRUE(base::DeleteFile(trimmed_recording, false));
 }