C++11 override style change for athena

athena/home/athena_start_page_view.h

Index: athena/home/athena_start_page_view.h
diff --git a/athena/home/athena_start_page_view.h b/athena/home/athena_start_page_view.h
index 4e0f19d465e1bb651a0e362eb4a37c12848192b6..13235f0bd0f7ab049eee4811c0587a3141e16e85 100644
--- a/athena/home/athena_start_page_view.h
+++ b/athena/home/athena_start_page_view.h
@@ -33,7 +33,7 @@ class ATHENA_EXPORT AthenaStartPageView
   };
 
   explicit AthenaStartPageView(app_list::AppListViewDelegate* delegate);
-  virtual ~AthenaStartPageView();
+  ~AthenaStartPageView() override;
 
   // Requests the focus on the search box in the start page view.
   void RequestFocusOnSearchBox();
@@ -85,18 +85,18 @@ class ATHENA_EXPORT AthenaStartPageView
   void OnSearchResultLayoutAnimationCompleted(bool should_show_search_results);
 
   // views::View:
-  virtual void Layout() override;
-  virtual bool OnKeyPressed(const ui::KeyEvent& key_event) override;
+  void Layout() override;
+  bool OnKeyPressed(const ui::KeyEvent& key_event) override;
 
   // app_list::SearchBoxViewDelegate:
-  virtual void QueryChanged(app_list::SearchBoxView* sender) override;
+  void QueryChanged(app_list::SearchBoxView* sender) override;
 
   // app_list::AppListItemListObserver:
-  virtual void OnListItemAdded(size_t index,
+  void OnListItemAdded(size_t index,
                                app_list::AppListItem* item) override;
-  virtual void OnListItemRemoved(size_t index,
+  void OnListItemRemoved(size_t index,
                                  app_list::AppListItem* item) override;
-  virtual void OnListItemMoved(size_t from_index,
+  void OnListItemMoved(size_t from_index,
                                size_t to_index,
                                app_list::AppListItem* item) override;