Made notification center notifications collapsed and expandable.

ui/message_center/message_bubble_base.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_MESSAGE_BUBBLE_BASE_H_
 #define UI_MESSAGE_CENTER_MESSAGE_BUBBLE_BASE_H_
 
 #include "base/memory/scoped_ptr.h"
+#include "ui/message_center/message_center.h"
 #include "ui/message_center/message_center_export.h"
-#include "ui/message_center/notification_list.h"
 #include "ui/views/bubble/tray_bubble_view.h"
 
 namespace message_center {
 
 class MESSAGE_CENTER_EXPORT MessageBubbleBase {
  public:
-  explicit MessageBubbleBase(NotificationList::Delegate* list_delegate);
+  explicit MessageBubbleBase(MessageCenter* message_center);
 
   virtual ~MessageBubbleBase();
 
   // Gets called when the bubble view associated with this bubble is
   // destroyed. Clears |bubble_view_| and calls OnBubbleViewDestroyed.
   void BubbleViewDestroyed();
 
   // Sets/Gets the maximum height of the bubble view. Setting 0 changes the
   // bubble to the default size. max_height() will return the default size
   // if SetMaxHeight() has not been called yet.
@@ skipping 26 matching lines @@
 
   views::TrayBubbleView* bubble_view() const { return bubble_view_; }
 
   static const SkColor kBackgroundColor;
   static const SkColor kHeaderBackgroundColorLight;
   static const SkColor kHeaderBackgroundColorDark;
 
  protected:
   views::TrayBubbleView::InitParams GetDefaultInitParams(
       views::TrayBubbleView::AnchorAlignment anchor_alignment);
-  NotificationList::Delegate* list_delegate() { return list_delegate_; }
+  MessageCenter* message_center() { return message_center_; }
   void set_bubble_view(views::TrayBubbleView* bubble_view) {
     bubble_view_ = bubble_view;
   }
 
  private:
-  NotificationList::Delegate* list_delegate_;
+  MessageCenter* message_center_;
   views::TrayBubbleView* bubble_view_;
   base::WeakPtrFactory<MessageBubbleBase> weak_ptr_factory_;
   int max_height_;
 
   DISALLOW_COPY_AND_ASSIGN(MessageBubbleBase);
 };
 
 }  // namespace message_center
 
 #endif // UI_MESSAGE_CENTER_MESSAGE_BUBBLE_BASE_H_