Refactor app list so AppsGridView owns the PaginationModel.

ui/app_list/views/app_list_main_view.h

 // Copyright 2013 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_VIEWS_APP_LIST_MAIN_VIEW_H_
 #define UI_APP_LIST_VIEWS_APP_LIST_MAIN_VIEW_H_
 
 #include <string>
 
 #include "base/memory/scoped_vector.h"
@@ skipping 21 matching lines @@
 
 // AppListMainView contains the normal view of the app list, which is shown
 // when the user is signed in.
 class APP_LIST_EXPORT AppListMainView : public views::View,
                                         public AppsGridViewDelegate,
                                         public SearchBoxViewDelegate,
                                         public SearchResultListViewDelegate {
  public:
   // Takes ownership of |delegate|.
   explicit AppListMainView(AppListViewDelegate* delegate,
-                           PaginationModel* pagination_model,
                            gfx::NativeView parent);
   virtual ~AppListMainView();
 
   void ShowAppListWhenReady();
 
   void ResetForShow();
 
   void Close();
 
   void Prerender();
@@ skipping 14 matching lines @@
   ContentsView* contents_view() const { return contents_view_; }
 
   // Returns true if the app list should be centered and in landscape mode.
   bool ShouldCenterWindow() const;
 
  private:
   class IconLoader;
 
   void AddContentsView();
 
+  // Gets the PaginationModel owned by the AppsGridView.
+  PaginationModel* GetAppsPaginationModel();
+
   // Loads icon image for the apps in the selected page of |pagination_model_|.
   // |parent| is used to determine the image scale factor to use.
   void PreloadIcons(gfx::NativeView parent);
 
   // Invoked when |icon_loading_wait_timer_| fires.
   void OnIconLoadingWaitTimer();
 
   // Invoked from an IconLoader when icon loading is finished.
   void OnItemIconLoaded(IconLoader* loader);
 
   // Overridden from views::View:
   virtual void ChildVisibilityChanged(views::View* child) OVERRIDE;
 
   // Overridden from AppsGridViewDelegate:
   virtual void ActivateApp(AppListItem* item, int event_flags) OVERRIDE;
   virtual void GetShortcutPathForApp(
       const std::string& app_id,
       const base::Callback<void(const base::FilePath&)>& callback) OVERRIDE;
 
   // Overridden from SearchBoxViewDelegate:
   virtual void QueryChanged(SearchBoxView* sender) OVERRIDE;
 
   // Overridden from SearchResultListViewDelegate:
   virtual void OnResultInstalled(SearchResult* result) OVERRIDE;
   virtual void OnResultUninstalled(SearchResult* result) OVERRIDE;
 
   AppListViewDelegate* delegate_;  // Owned by parent view (AppListView).
-  PaginationModel* pagination_model_;  // Owned by AppListController.
   AppListModel* model_;  // Unowned; ownership is handled by |delegate_|.
 
   SearchBoxView* search_box_view_;  // Owned by views hierarchy.
   ContentsView* contents_view_;  // Owned by views hierarchy.
 
   // A timer that fires when maximum allowed time to wait for icon loading has
   // passed.
   base::OneShotTimer<AppListMainView> icon_loading_wait_timer_;
 
   ScopedVector<IconLoader> pending_icon_loaders_;
 
   base::WeakPtrFactory<AppListMainView> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(AppListMainView);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_VIEWS_APP_LIST_MAIN_VIEW_H_