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 d06ecdf580895c42b7e0e8f7db4605abd77f87cd..956e8822060e3e2822caa7ba9ef5324443f82983 100644
--- a/ash/system/toast/toast_overlay.cc
+++ b/ash/system/toast/toast_overlay.cc
@@ -102,7 +102,7 @@ class ToastOverlayButton : public views::LabelButton {
 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);