Another official Linux build fix for {virtual,override,final}.

chrome/browser/media/encrypted_media_browsertest.cc

Index: chrome/browser/media/encrypted_media_browsertest.cc
diff --git a/chrome/browser/media/encrypted_media_browsertest.cc b/chrome/browser/media/encrypted_media_browsertest.cc
index 4b0cfdd98dc662ee8fbbf8a1b94ea6a9ef93cf5f..d57b9045a4210c5b592ce0640745f6163c2725c3 100644
--- a/chrome/browser/media/encrypted_media_browsertest.cc
+++ b/chrome/browser/media/encrypted_media_browsertest.cc
@@ -352,7 +352,7 @@ class ECKUnprefixedEncryptedMediaTest : public EncryptedMediaTestBase {
 // Tests encrypted media playback using Widevine key system.
 class WVEncryptedMediaTest : public EncryptedMediaTestBase {
  protected:
-  virtual void SetUpCommandLine(base::CommandLine* command_line) override {
+  void SetUpCommandLine(base::CommandLine* command_line) override {
     EncryptedMediaTestBase::SetUpCommandLine(command_line);
     command_line->AppendSwitch(switches::kEnableEncryptedMedia);
     SetUpCommandLineForKeySystem(kWidevineKeySystem, command_line);