C++11 override style change for athena

athena/wm/window_list_provider_impl_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 "athena/wm/window_list_provider_impl.h"
 
 #include <algorithm>
 
 #include "athena/screen/public/screen_manager.h"
 #include "athena/test/base/athena_test_base.h"
@@ skipping 46 matching lines @@
   }
   return output;
 }
 
 class WindowListObserver : public WindowListProviderObserver {
  public:
   explicit WindowListObserver(WindowListProvider* provider)
       : calls_(0), window_removal_calls_(0), provider_(provider) {
     provider_->AddObserver(this);
   }
-  virtual ~WindowListObserver() {
+  ~WindowListObserver() override {
     provider_->RemoveObserver(this);
   }
 
   int calls() const { return calls_; }
   int window_removal_calls() const { return window_removal_calls_; }
 
   // WindowListProviderObserver:
-  virtual void OnWindowStackingChanged() override {
+  void OnWindowStackingChanged() override {
     calls_++;
   }
 
-  virtual void OnWindowRemoved(aura::Window* removed_window,
+  void OnWindowRemoved(aura::Window* removed_window,
                                int index) override {
     window_removal_calls_++;
   }
 
  private:
   // The number of calls to the observer.
   int calls_;
   int window_removal_calls_;
 
   // The associated WindowListProvider which is observed.
@@ skipping 249 matching lines @@
   EXPECT_FALSE(t1->IsVisible());
   w1->Show();
   EXPECT_TRUE(t1->IsVisible());
 
   // Resetting transient window won't notify the observer.
   t1.reset();
   EXPECT_EQ(0, observer->window_removal_calls());
 }
 
 }  // namespace athena