app_list: Add transition for apps grid and search results.

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_
 #pragma once
 
 #include "base/basictypes.h"
 #include "ui/gfx/shadow_value.h"
 #include "ui/views/bubble/bubble_border.h"
 
 namespace app_list {
 
 // A class to paint bubble border and background.
 class AppListBubbleBorder : public views::BubbleBorder {
  public:
   AppListBubbleBorder(views::View* app_list_view,
-                      views::View* search_box_view,
-                      views::View* grid_view,
-                      views::View* results_view);
+                      views::View* search_box_view);
   virtual ~AppListBubbleBorder();
 
   bool ArrowAtTopOrBottom() const;
   bool ArrowOnLeftOrRight() const;
 
   void set_offset(const gfx::Point& offset) { offset_ = offset; }
   const gfx::Point& offset() const { return offset_; }
 
  private:
   // Gets arrow offset based on arrow location and |offset_|.
   int GetArrowOffset() const;
 
-  void PaintSearchBoxBackground(gfx::Canvas* canvas,
-                                const gfx::Rect& bounds) const;
-  void PaintSearchResultListBackground(gfx::Canvas* canvas,
-                                       const gfx::Rect& bounds) const;
-  void PaintAppsGridBackground(gfx::Canvas* canvas,
-                               const gfx::Rect& bounds) const;
+  void PaintBackground(gfx::Canvas* canvas,
+                       const gfx::Rect& bounds) const;
 
   // views::BubbleBorder overrides:
   virtual void GetInsets(gfx::Insets* insets) const OVERRIDE;
   virtual gfx::Rect GetBounds(const gfx::Rect& position_relative_to,
                               const gfx::Size& contents_size) const OVERRIDE;
 
   // views::Border overrides:
   virtual void Paint(const views::View& view,
                      gfx::Canvas* canvas) const OVERRIDE;
 
   // AppListView hosted inside this bubble.
   const views::View* app_list_view_;
 
   // Children view of AppListView that needs to paint background.
   const views::View* search_box_view_;
-  const views::View* grid_view_;
-  const views::View* results_view_;
 
   // Offset in pixels relative the default middle position.
   gfx::Point offset_;
 
   gfx::ShadowValues shadows_;
 
   DISALLOW_COPY_AND_ASSIGN(AppListBubbleBorder);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_APP_LIST_BUBBLE_BORDER_H_