Update {virtual,override,final} to follow C++11 style.

content/browser/media/media_source_browsertest.cc

 // Copyright (c) 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 "base/command_line.h"
 #include "content/browser/media/media_browsertest.h"
 #include "content/public/common/content_switches.h"
 #if defined(OS_ANDROID)
 #include "base/android/build_info.h"
 #endif
@@ skipping 31 matching lines @@
 
     base::StringPairs query_params;
     query_params.push_back(std::make_pair("mediaFile", media_file));
     query_params.push_back(std::make_pair("mediaType", media_type));
     query_params.push_back(std::make_pair("usePrefixedEME", "1"));
     RunMediaTestPage("media_source_player.html", query_params, expectation,
                      true);
   }
 
 #if defined(OS_ANDROID)
-  virtual void SetUpCommandLine(base::CommandLine* command_line) override {
+  void SetUpCommandLine(base::CommandLine* command_line) override {
     command_line->AppendSwitch(
         switches::kDisableGestureRequirementForMediaPlayback);
   }
 #endif
 };
 
 IN_PROC_BROWSER_TEST_F(MediaSourceTest, Playback_VideoAudio_WebM) {
   TestSimplePlayback("bear-320x240.webm", kWebMAudioVideo, kEnded);
 }
 
@@ skipping 22 matching lines @@
   if (!IsMSESupported()) {
     VLOG(0) << "Skipping test - MSE not supported.";
     return;
   }
   base::StringPairs query_params;
   query_params.push_back(std::make_pair("usePrefixedEME", "1"));
   RunMediaTestPage("mse_config_change.html", query_params, kEnded, true);
 }
 
 }  // namespace content