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

chrome/browser/profiles/profile_list_desktop_unittest.cc

Index: chrome/browser/profiles/profile_list_desktop_unittest.cc
diff --git a/chrome/browser/profiles/profile_list_desktop_unittest.cc b/chrome/browser/profiles/profile_list_desktop_unittest.cc
index 97db42ccc14daed4fee2e7a9a618d139fa0b31cf..e4cf9d7462385c4b7b102b75f4705d219140b4d0 100644
--- a/chrome/browser/profiles/profile_list_desktop_unittest.cc
+++ b/chrome/browser/profiles/profile_list_desktop_unittest.cc
@@ -30,12 +30,9 @@ namespace {
 class MockObserver : public AvatarMenuObserver {
  public:
   MockObserver() : count_(0) {}
-  virtual ~MockObserver() {}
+  ~MockObserver() override {}
 
-  virtual void OnAvatarMenuChanged(
-      AvatarMenu* avatar_menu) override {
-    ++count_;
-  }
+  void OnAvatarMenuChanged(AvatarMenu* avatar_menu) override { ++count_; }
 
   int change_count() const { return count_; }