Implement Non-Closable Notification

ui/message_center/views/message_center_button_bar.h

 // Copyright 2013 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_MESSAGE_CENTER_BUTTON_BAR_H_
 #define UI_MESSAGE_CENTER_VIEWS_MESSAGE_CENTER_BUTTON_BAR_H_
 
 #include "base/macros.h"
 #include "build/build_config.h"
+#include "ui/message_center/message_center_export.h"
 #include "ui/views/controls/button/button.h"
 #include "ui/views/controls/button/image_button.h"
 #include "ui/views/view.h"
 
 namespace views {
 class Label;
 }
 
 namespace message_center {
 
@@ skipping 16 matching lines @@
                          const base::string16& title);
   ~MessageCenterButtonBar() override;
 
   // Enables or disables all of the buttons in the center.  This is used to
   // prevent user clicks during the close-all animation.
   virtual void SetAllButtonsEnabled(bool enabled);
 
   // Sometimes we shouldn't see the close-all button.
   void SetCloseAllButtonEnabled(bool enabled);
 
+  MESSAGE_CENTER_EXPORT views::Button* GetCloseAllButtonForTest() const;
+
   // Sometimes we shouldn't see the back arrow (not in settings).
   void SetBackArrowVisible(bool visible);
 
  private:
+  FRIEND_TEST_ALL_PREFIXES(MessageCenterViewTest, CloseButton);

[dewittj, 2016/02/03 19:31:37]

Why do you need this if you have the ForTest() method?  If it's for the
ButtonPressed method, then possibly you should just upcast it to ButtonListener
and call the public method from that interface.

[yoshiki, 2016/02/07 17:49:41]

Done.

+
   // Updates the layout manager which can have differing configuration
   // depending on the visibility of different parts of the button bar.
   void ViewVisibilityChanged();
 
   // Overridden from views::View:
   void ChildVisibilityChanged(views::View* child) override;
 
   // Overridden from views::ButtonListener:
   void ButtonPressed(views::Button* sender, const ui::Event& event) override;
 
@@ skipping 21 matching lines @@
   NotificationCenterButton* close_all_button_;
   NotificationCenterButton* settings_button_;
   NotificationCenterButton* quiet_mode_button_;
 
   DISALLOW_COPY_AND_ASSIGN(MessageCenterButtonBar);
 };
 
 }  // namespace message_center
 
 #endif  // UI_MESSAGE_CENTER_VIEWS_MESSAGE_CENTER_BUTTON_BAR_H_