Convert TrayBubbleView to wm common types

ash/system/tray/tray_background_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 ASH_SYSTEM_TRAY_TRAY_BACKGROUND_VIEW_H_
 #define ASH_SYSTEM_TRAY_TRAY_BACKGROUND_VIEW_H_
 
 #include <memory>
 
 #include "ash/ash_export.h"
@@ skipping 95 matching lines @@
   // Called by the bubble wrapper when a click event occurs outside the bubble.
   // May close the bubble.
   virtual void ClickedOutsideBubble() = 0;
 
   // Sets |contents| as a child.
   void SetContents(views::View* contents);
 
   // Creates and sets contents background to |background_|.
   void SetContentsBackground();
 
-  // Returns the window hosting the bubble.
-  aura::Window* GetBubbleWindowContainer() const;
-
   // Returns the anchor rect for the bubble.
   gfx::Rect GetBubbleAnchorRect(
       views::Widget* anchor_widget,
       views::TrayBubbleView::AnchorType anchor_type,
       views::TrayBubbleView::AnchorAlignment anchor_alignment) const;
 
   // Returns the bubble anchor alignment based on |shelf_alignment_|.
   views::TrayBubbleView::AnchorAlignment GetAnchorAlignment() const;
 
   // Forces the background to be drawn active if set to true.
@@ skipping 51 matching lines @@
 
   std::unique_ptr<TrayWidgetObserver> widget_observer_;
   std::unique_ptr<TrayEventFilter> tray_event_filter_;
 
   DISALLOW_COPY_AND_ASSIGN(TrayBackgroundView);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_TRAY_TRAY_BACKGROUND_VIEW_H_