ash: Minor cleanup, move more files from launcher to shelf.

ash/launcher/overflow_bubble.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_LAUNCHER_OVERFLOW_BUBBLE_H_
-#define ASH_LAUNCHER_OVERFLOW_BUBBLE_H_
-
-#include "base/basictypes.h"
-#include "base/compiler_specific.h"
-#include "ui/views/widget/widget_observer.h"
-
-namespace views {
-class View;
-}
-
-namespace ash {
-
-class LauncherDelegate;
-class LauncherModel;
-
-namespace internal {
-
-class LauncherView;
-
-// OverflowBubble displays the overflown launcher items in a bubble.
-class OverflowBubble : public views::WidgetObserver {
- public:
-  OverflowBubble();
-  virtual ~OverflowBubble();
-
-  // Shows an bubble pointing to |anchor| with |launcher_view| as its content.
-  void Show(views::View* anchor, LauncherView* launcher_view);
-
-  void Hide();
-
-  bool IsShowing() const { return !!bubble_; }
-  LauncherView* launcher_view() { return launcher_view_; }
-
- private:
-  // Overridden from views::WidgetObserver:
-  virtual void OnWidgetDestroying(views::Widget* widget) OVERRIDE;
-
-  views::View* bubble_;  // Owned by views hierarchy.
-  LauncherView* launcher_view_;  // Owned by |bubble_|.
-
-  DISALLOW_COPY_AND_ASSIGN(OverflowBubble);
-};
-
-}  // namespace internal
-}  // namespace ash
-
-#endif  // ASH_LAUNCHER_OVERFLOW_BUBBLE_H_