replace OVERRIDE and FINAL with override and final in chrome/browser/extensions/

chrome/browser/extensions/startup_helper_browsertest.cc

Index: chrome/browser/extensions/startup_helper_browsertest.cc
diff --git a/chrome/browser/extensions/startup_helper_browsertest.cc b/chrome/browser/extensions/startup_helper_browsertest.cc
index 49a3db5660a42f42fe9aecca09b087a5a3b72f1a..22f71b11aa215b76b7e86dd5cd7a86537b456a2d 100644
--- a/chrome/browser/extensions/startup_helper_browsertest.cc
+++ b/chrome/browser/extensions/startup_helper_browsertest.cc
@@ -17,7 +17,7 @@ class StartupHelperBrowserTest : public InProcessBrowserTest {
   StartupHelperBrowserTest() {}
   virtual ~StartupHelperBrowserTest() {}
 
-  virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE {
+  virtual void SetUpCommandLine(CommandLine* command_line) override {
     command_line->AppendSwitch(switches::kNoStartupWindow);
     PathService::Get(chrome::DIR_TEST_DATA, &test_data_dir_);
     test_data_dir_ = test_data_dir_.AppendASCII("extensions");