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

ash/sticky_keys/sticky_keys_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/sticky_keys/sticky_keys_controller.h"
 
 #include <X11/Xlib.h>
 #undef None
 #undef Bool
 #undef RootWindow
@@ skipping 16 matching lines @@
 const unsigned int kTouchPadDeviceId = 1;
 
 }  // namespace
 
 class StickyKeysTest : public test::AshTestBase {
  protected:
   StickyKeysTest()
       : target_(NULL),
         root_window_(NULL) {}
 
-  virtual void SetUp() override {
+  void SetUp() override {
     test::AshTestBase::SetUp();
 
     // |target_| owned by root window of shell. It is still safe to delete
     // it ourselves.
     target_ = CreateTestWindowInShellWithId(0);
     root_window_ = target_->GetRootWindow();
 
     ui::SetUpTouchPadForTest(kTouchPadDeviceId);
   }
 
-  virtual void TearDown() override {
-    test::AshTestBase::TearDown();
-  }
+  void TearDown() override { test::AshTestBase::TearDown(); }
 
   virtual void OnShortcutPressed() {
     if (target_) {
       delete target_;
       target_ = NULL;
     }
   }
 
   ui::KeyEvent* GenerateKey(ui::EventType type, ui::KeyboardCode code) {
     scoped_xevent_.InitKeyEvent(type, code, 0);
@@ skipping 641 matching lines @@
                                                gfx::Point(0, 0)));
   released = false;
   mod_down_flags = 0;
   sticky_key.HandleMouseEvent(*mev.get(), &mod_down_flags, &released);
   EXPECT_TRUE(mod_down_flags & ui::EF_CONTROL_DOWN);
   EXPECT_TRUE(released);
   EXPECT_EQ(STICKY_KEY_STATE_DISABLED, sticky_key.current_state());
 }
 
 }  // namespace ash