Standardize usage of virtual/override/final specifiers in ash/.

ash/wm/always_on_top_controller_unittest.cc

 // Copyright 2014 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/wm/always_on_top_controller.h"
 
 #include "ash/root_window_controller.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "ash/test/ash_test_base.h"
@@ skipping 20 matching lines @@
 
  private:
   DISALLOW_COPY_AND_ASSIGN(VirtualKeyboardAlwaysOnTopControllerTest);
 };
 
 class TestLayoutManager : public WorkspaceLayoutManager {
  public:
   explicit TestLayoutManager(aura::Window* window)
       : WorkspaceLayoutManager(window), keyboard_bounds_changed_(false) {}
 
-  ~TestLayoutManager() {}
+  ~TestLayoutManager() override {}
 
-  virtual void OnKeyboardBoundsChanging(const gfx::Rect& bounds) override {
+  void OnKeyboardBoundsChanging(const gfx::Rect& bounds) override {
     keyboard_bounds_changed_ = true;
     WorkspaceLayoutManager::OnKeyboardBoundsChanging(bounds);
   }
 
   bool keyboard_bounds_changed() const { return keyboard_bounds_changed_; }
 
  private:
   bool keyboard_bounds_changed_;
   DISALLOW_COPY_AND_ASSIGN(TestLayoutManager);
 };
@@ skipping 29 matching lines @@
       keyboard_container->bounds(), kKeyboardHeight);
   keyboard_window->SetBounds(keyboard_bounds);
   keyboard_window->Show();
   keyboard_controller->NotifyKeyboardBoundsChanging(keyboard_bounds);
   // Verify that test manager was notified of bounds change.
   ASSERT_TRUE(manager->keyboard_bounds_changed());
 }
 
 }  // namespace test
 }  // namespace ash