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

chrome/browser/first_run/first_run_browsertest.cc

Index: chrome/browser/first_run/first_run_browsertest.cc
diff --git a/chrome/browser/first_run/first_run_browsertest.cc b/chrome/browser/first_run/first_run_browsertest.cc
index 18b2acced379ffdcbef9aa634c3d0a81ffd126dd..d28a41cc769fe9d31877edf2e8aee590b0918a12 100644
--- a/chrome/browser/first_run/first_run_browsertest.cc
+++ b/chrome/browser/first_run/first_run_browsertest.cc
@@ -101,7 +101,7 @@ class FirstRunMasterPrefsBrowserTestBase : public InProcessBrowserTest {
     InProcessBrowserTest::TearDown();
   }
 
-  virtual void SetUpCommandLine(CommandLine* command_line) override {
+  void SetUpCommandLine(CommandLine* command_line) override {
     InProcessBrowserTest::SetUpCommandLine(command_line);
     command_line->AppendSwitch(switches::kForceFirstRun);
     EXPECT_EQ(first_run::AUTO_IMPORT_NONE, first_run::auto_import_state());
@@ -249,7 +249,7 @@ class FirstRunMasterPrefsWithTrackedPreferences
     : public FirstRunMasterPrefsBrowserTestT<kWithTrackedPrefs>,
       public testing::WithParamInterface<std::string> {
  public:
-  virtual void SetUpCommandLine(CommandLine* command_line) override {
+  void SetUpCommandLine(CommandLine* command_line) override {
     FirstRunMasterPrefsBrowserTestT::SetUpCommandLine(command_line);
     command_line->AppendSwitchASCII(
         switches::kForceFieldTrials,