Remove the most obvious dead code from message center.

ui/message_center/views/message_center_view.h

 // Copyright (c) 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_VIEW_H_
 #define UI_MESSAGE_CENTER_VIEWS_MESSAGE_CENTER_VIEW_H_
 
 #include "ui/views/view.h"
 
 #include "ui/base/animation/animation_delegate.h"
 #include "ui/message_center/message_center_export.h"
 #include "ui/message_center/message_center_observer.h"
 #include "ui/message_center/notification_list.h"
+#include "ui/views/controls/button/button.h"
 
 namespace ui {
 class MultiAnimation;
 }  // namespace ui
 
 namespace views {
 class Button;
 }  // namespace views
 
 namespace message_center {
 
 class MessageCenter;
 class MessageCenterBubble;
+class NotificationCenterButton;
 class MessageCenterTray;
 class MessageCenterView;
 class MessageView;
 class MessageListView;
 class NotifierSettingsView;
 
 // MessageCenterButtonBar //////////////////////////////////////////////////////
 
 // If you know how to better hide this implementation class please do so, and
 // otherwise please refrain from using it :-).
-class MessageCenterButtonBar : public views::View {
+class MessageCenterButtonBar : public views::View,
+                               public views::ButtonListener {
  public:
   MessageCenterButtonBar(MessageCenterView* message_center_view,
                          MessageCenter* message_center);
   virtual ~MessageCenterButtonBar();
 
   virtual void SetAllButtonsEnabled(bool enabled);
-
   void SetCloseAllVisible(bool visible);
 
- protected:
+ private:
+  // Overridden from views::View:
+  virtual void ChildVisibilityChanged(views::View* child) OVERRIDE;
+
+  // Overridden from views::ButtonListener:
+  virtual void ButtonPressed(views::Button* sender, const ui::Event& event)
+      OVERRIDE;
+
   MessageCenterView* message_center_view() const {
     return message_center_view_;
   }
   MessageCenter* message_center() const { return message_center_; }
   MessageCenterTray* tray() const { return tray_; }
   views::Button* close_all_button() const { return close_all_button_; }
   void set_close_all_button(views::Button* button) {
     close_all_button_ = button;
   }
 
- private:
   MessageCenterView* message_center_view_;  // Weak reference.
   MessageCenter* message_center_;  // Weak reference.
   MessageCenterTray* tray_;  // Weak reference.
   views::Button* close_all_button_;
+  NotificationCenterButton* settings_button_;
+  NotificationCenterButton* quiet_mode_button_;
 
   DISALLOW_COPY_AND_ASSIGN(MessageCenterButtonBar);
 };
 
 // MessageCenterView ///////////////////////////////////////////////////////////
 
 class MESSAGE_CENTER_EXPORT MessageCenterView : public views::View,
                                                 public MessageCenterObserver,
                                                 public ui::AnimationDelegate {
  public:
@@ skipping 55 matching lines @@
   int source_height_;
   int target_height_;
   scoped_ptr<ui::MultiAnimation> settings_transition_animation_;
 
   DISALLOW_COPY_AND_ASSIGN(MessageCenterView);
 };
 
 }  // namespace message_center
 
 #endif  // UI_MESSAGE_CENTER_VIEWS_MESSAGE_CENTER_VIEW_H_