Standardize usage of virtual/override/final in chrome/

chrome/test/base/in_process_browser_test.cc

Index: chrome/test/base/in_process_browser_test.cc
diff --git a/chrome/test/base/in_process_browser_test.cc b/chrome/test/base/in_process_browser_test.cc
index 4034d56a4e35df493271bcab37977c91bdb2b456..21eeef8b47bc5c51229e0f4c9dfb5e4038871e9d 100644
--- a/chrome/test/base/in_process_browser_test.cc
+++ b/chrome/test/base/in_process_browser_test.cc
@@ -85,10 +85,10 @@ class SingleDesktopTestObserver : public chrome::BrowserListObserver,
                                   public base::NonThreadSafe {
  public:
   explicit SingleDesktopTestObserver(chrome::HostDesktopType allowed_desktop);
-  virtual ~SingleDesktopTestObserver();
+  ~SingleDesktopTestObserver() override;
 
   // chrome::BrowserListObserver:
-  virtual void OnBrowserAdded(Browser* browser) override;
+  void OnBrowserAdded(Browser* browser) override;
 
  private:
   chrome::HostDesktopType allowed_desktop_;