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

chrome/browser/extensions/active_script_controller_browsertest.cc

Index: chrome/browser/extensions/active_script_controller_browsertest.cc
diff --git a/chrome/browser/extensions/active_script_controller_browsertest.cc b/chrome/browser/extensions/active_script_controller_browsertest.cc
index ff1dd414f3889349d9f21566754c939ef5f38b36..d282170b04960b14d3360fbf8a4c16e95f661448 100644
--- a/chrome/browser/extensions/active_script_controller_browsertest.cc
+++ b/chrome/browser/extensions/active_script_controller_browsertest.cc
@@ -71,8 +71,8 @@ class ActiveScriptControllerBrowserTest : public ExtensionBrowserTest {
  public:
   ActiveScriptControllerBrowserTest() {}
 
-  virtual void SetUpCommandLine(base::CommandLine* command_line) override;
-  virtual void TearDownOnMainThread() override;
+  void SetUpCommandLine(base::CommandLine* command_line) override;
+  void TearDownOnMainThread() override;
 
   // Returns an extension with the given |host_type| and |injection_type|. If
   // one already exists, the existing extension will be returned. Othewrwise,
@@ -408,7 +408,7 @@ class FlagOffActiveScriptControllerBrowserTest
     : public ActiveScriptControllerBrowserTest {
  private:
   // Simply don't append the flag.
-  virtual void SetUpCommandLine(base::CommandLine* command_line) override {
+  void SetUpCommandLine(base::CommandLine* command_line) override {
     ExtensionBrowserTest::SetUpCommandLine(command_line);
   }
 };