Add ripple effect to action buttons in new-style notification.

ui/message_center/views/notification_view_md.h

 // 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.
 
 #ifndef UI_MESSAGE_CENTER_VIEWS_NOTIFICATION_VIEW_MD_H_
 #define UI_MESSAGE_CENTER_VIEWS_NOTIFICATION_VIEW_MD_H_
 
 #include <vector>
 
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "ui/message_center/message_center_export.h"
 #include "ui/message_center/views/message_view.h"
 #include "ui/views/controls/button/button.h"
 #include "ui/views/view_targeter_delegate.h"
 
 namespace views {
 class Label;
-class LabelButton;
 class ProgressBar;
 }
 
 namespace message_center {
 
 class BoundedLabel;
 class NotificationHeaderView;
 class ProportionalImageView;
 
 namespace {
 class CompactTitleMessageView;
 class ItemView;
+class NotificationButtonMD;
 }
 
 // View that displays all current types of notification (web, basic, image, and
 // list) except the custom notification. Future notification types may be
 // handled by other classes, in which case instances of those classes would be
 // returned by the Create() factory method below.
 class MESSAGE_CENTER_EXPORT NotificationViewMD
     : public MessageView,
       public views::ButtonListener,
       public views::ViewTargeterDelegate {
@@ skipping 55 matching lines @@
   // Containers for left and right side on |content_row_|
   views::View* left_content_ = nullptr;
   views::View* right_content_ = nullptr;
 
   // Views which are dinamicallly created inside view hierarchy.
   views::Label* title_view_ = nullptr;
   BoundedLabel* message_view_ = nullptr;
   ProportionalImageView* icon_view_ = nullptr;
   views::View* image_container_ = nullptr;
   ProportionalImageView* image_view_ = nullptr;
-  std::vector<views::LabelButton*> action_buttons_;
+  std::vector<NotificationButtonMD*> action_buttons_;

[fukino, 2017/06/29 04:11:03]

We can still keep the type as views::LabelButton* in this header.

[tetsui, 2017/06/29 04:23:11]

Done.

   std::vector<ItemView*> item_views_;
   views::ProgressBar* progress_bar_view_ = nullptr;
   CompactTitleMessageView* compact_title_message_view_ = nullptr;
 
   DISALLOW_COPY_AND_ASSIGN(NotificationViewMD);
 };
 
 }  // namespace message_center
 
 #endif  // UI_MESSAGE_CENTER_VIEWS_NOTIFICATION_VIEW_MD_H_