Moved ButtonInkDropDelegate logic into InkDropHostView and deleted InkDropDelegates.

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"
 #include "ash/shell.h"
 #include "ash/wm/window_animations.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "grit/ash_strings.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/font_list.h"
-#include "ui/views/animation/button_ink_drop_delegate.h"
 #include "ui/views/border.h"
 #include "ui/views/controls/button/label_button.h"
 #include "ui/views/controls/label.h"
 #include "ui/views/layout/box_layout.h"
 #include "ui/views/view.h"
 #include "ui/views/widget/widget.h"
 #include "ui/views/widget/widget_delegate.h"
 
 namespace ash {
 
@@ skipping 82 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) {
-  set_ink_drop_delegate(
-      base::WrapUnique(new views::ButtonInkDropDelegate(this, this)));
+  SetHasInkDrop(true);
   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 153 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