Standardize usage of virtual/override/final specifiers.

chrome/browser/media/encrypted_media_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 "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/path_service.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/win/windows_version.h"
 #include "chrome/browser/media/media_browsertest.h"
@@ skipping 320 matching lines @@
     SetUpCommandLineForKeySystem(kExternalClearKeyKeySystem, command_line);
   }
 };
 
 // Tests encrypted media playback using ExternalClearKey key system in
 // decrypt-and-decode mode for unprefixed EME.
 // TODO(jrummell): Merge with ECKEncryptedMediaTest once unprefixed is
 // enabled by default.
 class ECKUnprefixedEncryptedMediaTest : public EncryptedMediaTestBase {
  protected:
-  virtual void SetUpCommandLine(CommandLine* command_line) override {
+  void SetUpCommandLine(CommandLine* command_line) override {
     EncryptedMediaTestBase::SetUpCommandLine(command_line);
     command_line->AppendSwitch(switches::kEnableEncryptedMedia);
     SetUpCommandLineForKeySystem(kExternalClearKeyKeySystem, command_line);
   }
 };
 
 #if defined(WIDEVINE_CDM_AVAILABLE)
 // Tests encrypted media playback using Widevine key system.
 class WVEncryptedMediaTest : public EncryptedMediaTestBase {
  protected:
@@ skipping 346 matching lines @@
                         "bear-320x240-v_enc-v.webm",
                         kWebMVideoOnly,
                         kExternalClearKeyKeySystem,
                         SRC,
                         UNPREFIXED,
                         kUnknownSession,
                         false,
                         kEmeKeyError);
 }
 #endif  // defined(ENABLE_PEPPER_CDMS)