Make close button visible when focusing inline actions.

ui/message_center/views/notification_view.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_H_
 #define UI_MESSAGE_CENTER_VIEWS_NOTIFICATION_VIEW_H_
 
 #include <vector>
 
 #include "base/gtest_prod_util.h"
@@ skipping 76 matching lines @@
   void CreateOrUpdateListItemViews(const Notification& notification);
   void CreateOrUpdateIconView(const Notification& notification);
   void CreateOrUpdateSmallIconView(const Notification& notification);
   void CreateOrUpdateImageView(const Notification& notification);
   void CreateOrUpdateActionButtonViews(const Notification& notification);
   void CreateOrUpdateCloseButtonView(const Notification& notification);
 
   int GetMessageLineLimit(int title_lines, int width) const;
   int GetMessageHeight(int width, int limit) const;
 
+  // True if this view or its descendant views have focus.
+  bool HasFocusedView();
+
   // Formats the context message to be displayed based on |context|
   // so it shows as much information as possible
   // given the space available in the ContextMessage section of the
   // notification.
   base::string16 FormatContextMessage(const Notification& notification) const;
 
   // Describes whether the view should display a hand pointer or not.
   bool clickable_;
 
   // Weak references to NotificationView descendants owned by their parents.
@@ skipping 12 matching lines @@
   std::vector<views::View*> separators_;
   std::unique_ptr<views::ImageButton> close_button_ = nullptr;
   std::unique_ptr<views::ImageView> small_image_view_;
 
   DISALLOW_COPY_AND_ASSIGN(NotificationView);
 };
 
 }  // namespace message_center
 
 #endif  // UI_MESSAGE_CENTER_VIEWS_NOTIFICATION_VIEW_H_