Consolidate bubble border code.

ui/app_list/app_list_bubble_border.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_APP_LIST_APP_LIST_BUBBLE_BORDER_H_
-#define UI_APP_LIST_APP_LIST_BUBBLE_BORDER_H_
-
-#include "base/basictypes.h"
-#include "ui/gfx/shadow_value.h"
-#include "ui/views/bubble/bubble_border_2.h"
-
-namespace app_list {
-
-// A class to paint bubble border and background.
-class AppListBubbleBorder : public views::BubbleBorder2 {
- public:
-  AppListBubbleBorder(views::View* app_list_view,
-                      views::View* search_box_view);
-  virtual ~AppListBubbleBorder();
-
- private:
-  // views::BubbleBorder2 overrides:
-  virtual void PaintBackground(gfx::Canvas* canvas,
-                               const gfx::Rect& bounds) const OVERRIDE;
-
-  // AppListView hosted inside this bubble.
-  const views::View* app_list_view_;  // Owned by views hierarchy.
-
-  // Children view of AppListView that needs to paint background.
-  const views::View* search_box_view_;  // Owned by views hierarchy.
-
-  DISALLOW_COPY_AND_ASSIGN(AppListBubbleBorder);
-};
-
-}  // namespace app_list
-
-#endif  // UI_APP_LIST_APP_LIST_BUBBLE_BORDER_H_