Add ink drop ripple to overview mode button

ash/common/system/tray/actionable_view.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_SYSTEM_TRAY_ACTIONABLE_VIEW_H_
 #define ASH_COMMON_SYSTEM_TRAY_ACTIONABLE_VIEW_H_
 
 #include "ash/ash_export.h"
 #include "base/macros.h"
 #include "ui/gfx/geometry/rect.h"
@@ skipping 34 matching lines @@
   void OnPaintFocus(gfx::Canvas* canvas);
 
   // Returns the bounds to paint the focus rectangle in.
   virtual gfx::Rect GetFocusBounds();
 
   // Performs an action when user clicks on the view (on mouse-press event), or
   // presses a key when this view is in focus. Returns true if the event has
   // been handled and an action was performed. Returns false otherwise.
   virtual bool PerformAction(const ui::Event& event) = 0;
 
+  // Called after PerformAction() to act upon its result, including showing
+  // appropriate ink drop ripple. This will not get called if the view is
+  // destroyed during PerformAction(). Default implementation shows triggered
+  // ripple if action is performed or hides existing ripple if no action is
+  // performed. Subclasses can override to change the default behavior.
+  virtual void HandlePerformActionResult(bool action_performed,
+                                         const ui::Event& event);
+
   // Overridden from views::CustomButton.
   const char* GetClassName() const override;
   bool OnKeyPressed(const ui::KeyEvent& event) override;
   void GetAccessibleNodeData(ui::AXNodeData* node_data) override;
   void OnPaint(gfx::Canvas* canvas) override;
   void OnFocus() override;
   void OnBlur() override;
   std::unique_ptr<views::InkDrop> CreateInkDrop() override;
   std::unique_ptr<views::InkDropRipple> CreateInkDropRipple() const override;
   std::unique_ptr<views::InkDropHighlight> CreateInkDropHighlight()
@@ skipping 27 matching lines @@
 
  private:
   views::ButtonListener* listener_;
 
   DISALLOW_COPY_AND_ASSIGN(ButtonListenerActionableView);
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_SYSTEM_TRAY_ACTIONABLE_VIEW_H_