views: disable ink drops altogether on Mac

ui/views/controls/combobox/combobox.cc

 // Copyright (c) 2012 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 "ui/views/controls/combobox/combobox.h"
 
 #include <stddef.h>
 
 #include <utility>
 
@@ skipping 105 matching lines @@
  public:
   TransparentButton(ButtonListener* listener, bool animate_state_change)
       : CustomButton(listener) {
     set_animate_on_state_change(animate_state_change);
     if (animate_state_change)
       SetAnimationDuration(LabelButton::kHoverAnimationDurationMs);
     SetFocusBehavior(FocusBehavior::NEVER);
     set_notify_action(PlatformStyle::kMenuNotifyActivationAction);
 
     if (UseMd()) {
-      SetInkDropMode(PlatformStyle::kUseRipples ? InkDropMode::ON
-                                                : InkDropMode::OFF);
+      SetInkDropMode(InkDropMode::ON);
       set_has_ink_drop_action_on_click(true);
     }
   }
   ~TransparentButton() override {}
 
   bool OnMousePressed(const ui::MouseEvent& mouse_event) override {
 #if !defined(OS_MACOSX)
     // On Mac, comboboxes do not take focus on mouse click, but on other
     // platforms they do.
     parent()->RequestFocus();
@@ skipping 873 matching lines @@
   constexpr int kMdPaddingWidth = 8;
   constexpr int kNormalPaddingWidth = 7;
   int arrow_pad = UseMd() ? kMdPaddingWidth : kNormalPaddingWidth;
   int padding = style_ == STYLE_NORMAL
                     ? arrow_pad * 2
                     : kActionLeftPadding + kActionRightPadding;
   return ArrowSize().width() + padding;
 }
 
 }  // namespace views