Standardize usage of virtual/override/final specifiers.

ash/wm/partial_screenshot_view_unittest.cc

 // Copyright (c) 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/wm/partial_screenshot_view.h"
 
 #include "ash/screenshot_delegate.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/test/test_overlay_delegate.h"
 #include "ash/test/test_screenshot_delegate.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/events/test/event_generator.h"
 #include "ui/views/widget/widget.h"
 #include "ui/views/widget/widget_observer.h"
 
 namespace ash {
 
 class PartialScreenshotViewTest : public test::AshTestBase,
                                   public views::WidgetObserver {
  public:
   PartialScreenshotViewTest() : view_(NULL) {}
-  virtual ~PartialScreenshotViewTest() {
+  ~PartialScreenshotViewTest() override {
     if (view_)
       view_->GetWidget()->RemoveObserver(this);
   }
 
   void StartPartialScreenshot() {
     std::vector<PartialScreenshotView*> views =
         PartialScreenshotView::StartPartialScreenshot(GetScreenshotDelegate());
     if (!views.empty()) {
       view_ = views[0];
       view_->GetWidget()->AddObserver(this);
     }
   }
 
  protected:
   PartialScreenshotView* view_;
 
  private:
   // views::WidgetObserver:
-  virtual void OnWidgetDestroying(views::Widget* widget) override {
+  void OnWidgetDestroying(views::Widget* widget) override {
     if (view_ && view_->GetWidget() == widget)
       view_ = NULL;
     widget->RemoveObserver(this);
   }
 
   DISALLOW_COPY_AND_ASSIGN(PartialScreenshotViewTest);
 };
 
 TEST_F(PartialScreenshotViewTest, BasicMouse) {
   StartPartialScreenshot();
@@ skipping 59 matching lines @@
 
   // Someone else attempts to activate the overlay session, which should cancel
   // the current partial screenshot session.
   overlay_filter->Activate(&delegate);
   RunAllPendingInMessageLoop();
   EXPECT_EQ(&delegate, overlay_filter->delegate_);
   EXPECT_TRUE(view_ == NULL);
 }
 
 }  // namespace ash