Skeleton for app_list on OSX, and refactoring for enable_app_list=1 on OS=="mac".

ui/app_list/contents_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 UI_APP_LIST_CONTENTS_VIEW_H_
-#define UI_APP_LIST_CONTENTS_VIEW_H_
-
-#include "base/basictypes.h"
-#include "base/compiler_specific.h"
-#include "base/memory/scoped_ptr.h"
-#include "ui/views/view.h"
-
-namespace views {
-class BoundsAnimator;
-class ViewModel;
-}
-
-namespace app_list {
-
-class AppListModel;
-class AppListView;
-class PaginationModel;
-
-// A view to manage sub views under the search box (apps grid view + page
-// switcher and search results). The two sets of sub views are mutually
-// exclusive. ContentsView manages a show state to choose one set to show
-// and animates the transition between show states.
-class ContentsView : public views::View {
- public:
-  ContentsView(AppListView* app_list_view,
-               PaginationModel* pagination_model);
-  virtual ~ContentsView();
-
-  void SetModel(AppListModel* model);
-
-  void ShowSearchResults(bool show);
-
- private:
-  enum ShowState {
-    SHOW_APPS,
-    SHOW_SEARCH_RESULTS,
-  };
-
-  // Sets show state.
-  void SetShowState(ShowState show_state);
-
-  // Invoked when show state is changed.
-  void ShowStateChanged();
-
-  void CalculateIdealBounds();
-  void AnimateToIdealBounds();
-
-  // Overridden from views::View:
-  virtual gfx::Size GetPreferredSize() OVERRIDE;
-  virtual void Layout() OVERRIDE;
-  virtual bool OnKeyPressed(const ui::KeyEvent& event) OVERRIDE;
-  virtual bool OnMouseWheel(const ui::MouseWheelEvent& event) OVERRIDE;
-
-  // Overridden from ui::EventHandler:
-  virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
-  virtual void OnScrollEvent(ui::ScrollEvent* event) OVERRIDE;
-
-  ShowState show_state_;
-  PaginationModel* pagination_model_;  // Owned by AppListController.
-
-  scoped_ptr<views::ViewModel> view_model_;
-  scoped_ptr<views::BoundsAnimator> bounds_animator_;
-
-  DISALLOW_COPY_AND_ASSIGN(ContentsView);
-};
-
-}  // namespace app_list
-
-#endif  // UI_APP_LIST_CONTENTS_VIEW_H_