Add ink drop ripple to shelf overflow button

ash/common/shelf/overflow_bubble.h

 // 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.
 
 #ifndef ASH_COMMON_SHELF_OVERFLOW_BUBBLE_H_
 #define ASH_COMMON_SHELF_OVERFLOW_BUBBLE_H_
 
 #include "base/macros.h"
 #include "ui/views/pointer_watcher.h"
 #include "ui/views/widget/widget_observer.h"
 
 namespace ui {
 class PointerEvent;
 }
 
 namespace views {
 class View;
 }
 
 namespace ash {
 class OverflowBubbleView;
+class OverflowButton;
 class ShelfView;
 class WmShelf;
 
 // OverflowBubble shows shelf items that won't fit on the main shelf in a
 // separate bubble.
 class OverflowBubble : public views::PointerWatcher,
                        public views::WidgetObserver {
  public:
   // |wm_shelf| is the shelf that spawns the bubble.
   explicit OverflowBubble(WmShelf* wm_shelf);
   ~OverflowBubble() override;
 
-  // Shows an bubble pointing to |anchor| with |shelf_view| as its content.
+  // Shows an bubble pointing to |button| with |shelf_view| as its content.
   // This |shelf_view| is different than the main shelf's view and only contains
   // the overflow items.
-  void Show(views::View* anchor, ShelfView* shelf_view);
+  void Show(OverflowButton* button, ShelfView* shelf_view);
 
   void Hide();
 
-  // Hides the bubble and schedules paint for overflow button.
-  void HideBubbleAndRefreshButton();
-
   bool IsShowing() const { return !!bubble_; }
   ShelfView* shelf_view() { return shelf_view_; }
   OverflowBubbleView* bubble_view() { return bubble_; }
 
  private:
   void ProcessPressedEvent(const gfx::Point& event_location_in_screen);
 
   // views::PointerWatcher:
   void OnPointerEventObserved(const ui::PointerEvent& event,
                               const gfx::Point& location_in_screen,
                               views::Widget* target) override;
 
   // Overridden from views::WidgetObserver:
   void OnWidgetDestroying(views::Widget* widget) override;
 
   WmShelf* wm_shelf_;
   OverflowBubbleView* bubble_;  // Owned by views hierarchy.
-  views::View* anchor_;         // Owned by ShelfView.
+  OverflowButton* button_;      // Owned by ShelfView.
 
   // ShelfView containing the overflow items. Owned by |bubble_|.
   ShelfView* shelf_view_;
 
   DISALLOW_COPY_AND_ASSIGN(OverflowBubble);
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_SHELF_OVERFLOW_BUBBLE_H_