Update {virtual,override,final} to follow C++11 style in ash.

ash/autoclick/autoclick_unittest.cc

Index: ash/autoclick/autoclick_unittest.cc
diff --git a/ash/autoclick/autoclick_unittest.cc b/ash/autoclick/autoclick_unittest.cc
index 7166dae8cdd232e11fe74cfb4f62ad41422e5ea7..5f54bfc30e3b64eef10379acb0d0c9ba92cc8b4e 100644
--- a/ash/autoclick/autoclick_unittest.cc
+++ b/ash/autoclick/autoclick_unittest.cc
@@ -19,13 +19,13 @@ namespace ash {
 class MouseEventCapturer : public ui::EventHandler {
  public:
   MouseEventCapturer() { Reset(); }
-  virtual ~MouseEventCapturer() {}
+  ~MouseEventCapturer() override {}
 
   void Reset() {
     events_.clear();
   }
 
-  virtual void OnMouseEvent(ui::MouseEvent* event) override {
+  void OnMouseEvent(ui::MouseEvent* event) override {
     if (!(event->flags() & ui::EF_LEFT_MOUSE_BUTTON))
       return;
     // Filter out extraneous mouse events like mouse entered, exited,
@@ -62,9 +62,9 @@ class MouseEventCapturer : public ui::EventHandler {
 class AutoclickTest : public test::AshTestBase {
  public:
   AutoclickTest() {}
-  virtual ~AutoclickTest() {}
+  ~AutoclickTest() override {}
 
-  virtual void SetUp() override {
+  void SetUp() override {
     test::AshTestBase::SetUp();
     Shell::GetInstance()->AddPreTargetHandler(&mouse_event_capturer_);
     GetAutoclickController()->SetAutoclickDelay(0);
@@ -73,7 +73,7 @@ class AutoclickTest : public test::AshTestBase {
     GetEventGenerator().MoveMouseTo(100, 100);
   }
 
-  virtual void TearDown() override {
+  void TearDown() override {
     Shell::GetInstance()->RemovePreTargetHandler(&mouse_event_capturer_);
     test::AshTestBase::TearDown();
   }