Add MD ink drop ripple to app list button

ash/system/toast/toast_overlay.cc

 // Copyright 2016 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/system/toast/toast_overlay.h"
 
 #include "ash/common/shell_window_ids.h"
 #include "ash/screen_util.h"
 #include "ash/shelf/shelf.h"
 #include "ash/shelf/shelf_layout_manager.h"
@@ skipping 84 matching lines @@
 
  private:
   friend class ToastOverlay;  // for ToastOverlay::ClickDismissButtonForTesting.
 
   DISALLOW_COPY_AND_ASSIGN(ToastOverlayButton);
 };
 
 ToastOverlayButton::ToastOverlayButton(views::ButtonListener* listener,
                                        const base::string16& text)
     : views::LabelButton(listener, text) {
-  SetHasInkDrop(true);
+  SetHasInkDrop(INK_DROP_WITH_GESTURE_HANDLING);
   set_has_ink_drop_action_on_click(true);
   set_ink_drop_base_color(SK_ColorWHITE);
 
   ui::ResourceBundle* rb = &ui::ResourceBundle::GetSharedInstance();
 
   SetEnabledTextColors(kButtonTextColor);
   SetFontList(rb->GetFontList(kTextFontStyle));
 
   // Treat the space below the baseline as a margin.
   int verticalSpacing = kToastVerticalSpacing -
@@ skipping 161 matching lines @@
 
 views::Widget* ToastOverlay::widget_for_testing() {
   return overlay_widget_.get();
 }
 
 void ToastOverlay::ClickDismissButtonForTesting(const ui::Event& event) {
   overlay_view_->button()->NotifyClick(event);
 }
 
 }  // namespace ash