Refactor app list so AppsGridView owns the PaginationModel.

ui/app_list/views/app_list_folder_view.cc

Index: ui/app_list/views/app_list_folder_view.cc
diff --git a/ui/app_list/views/app_list_folder_view.cc b/ui/app_list/views/app_list_folder_view.cc
index 6ad42fbdfcecb1445605914cf7046c64487df57c..fb7ddb73899d5e0422597193f91cc0cbb5603256 100644
--- a/ui/app_list/views/app_list_folder_view.cc
+++ b/ui/app_list/views/app_list_folder_view.cc
@@ -11,7 +11,6 @@
 #include "ui/app_list/app_list_constants.h"
 #include "ui/app_list/app_list_folder_item.h"
 #include "ui/app_list/app_list_model.h"
-#include "ui/app_list/pagination_model.h"
 #include "ui/app_list/views/app_list_item_view.h"
 #include "ui/app_list/views/app_list_main_view.h"
 #include "ui/app_list/views/apps_container_view.h"
@@ -51,13 +50,11 @@ AppListFolderView::AppListFolderView(AppsContainerView* container_view,
       view_model_(new views::ViewModel),
       model_(model),
       folder_item_(NULL),
-      pagination_model_(new PaginationModel),
       hide_for_reparent_(false) {
   AddChildView(folder_header_view_);
   view_model_->Add(folder_header_view_, kIndexFolderHeader);
 
-  items_grid_view_ =
-      new AppsGridView(app_list_main_view_, pagination_model_.get());
+  items_grid_view_ = new AppsGridView(app_list_main_view_);
   items_grid_view_->set_folder_delegate(this);
   items_grid_view_->SetLayout(
       kPreferredIconDimension,
@@ -77,8 +74,6 @@ AppListFolderView::AppListFolderView(AppsContainerView* container_view,
 
 AppListFolderView::~AppListFolderView() {
   model_->RemoveObserver(this);
-  // Make sure |items_grid_view_| is deleted before |pagination_model_|.
-  RemoveAllChildViews(true);
 }
 
 void AppListFolderView::SetAppListFolderItem(AppListFolderItem* folder) {