Add MD ink drop ripple to app list button

ash/system/toast/toast_overlay.cc

Index: ash/system/toast/toast_overlay.cc
diff --git a/ash/system/toast/toast_overlay.cc b/ash/system/toast/toast_overlay.cc
index 752547e0b756a77bc73b9bceff1054cf70510bba..667ddf45cb839dde8ba2543b3bb1218bc2b96bac 100644
--- a/ash/system/toast/toast_overlay.cc
+++ b/ash/system/toast/toast_overlay.cc
@@ -112,7 +112,7 @@ class ToastOverlayButton : public views::LabelButton {
 ToastOverlayButton::ToastOverlayButton(views::ButtonListener* listener,
                                        const base::string16& text)
     : views::LabelButton(listener, text) {
-  SetHasInkDrop(true);
+  SetInkDropMode(INK_DROP_WITH_GESTURE_HANDLING);
   set_has_ink_drop_action_on_click(true);
   set_ink_drop_base_color(SK_ColorWHITE);