Refactor app list so AppsGridView owns the PaginationModel.

ui/app_list/views/app_list_demo.cc

 // Copyright 2014 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.
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/run_loop.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/content_switches.h"
 #include "grit/ui_resources.h"
-#include "ui/app_list/pagination_model.h"
 #include "ui/app_list/test/app_list_test_model.h"
 #include "ui/app_list/test/app_list_test_view_delegate.h"
 #include "ui/app_list/views/app_list_view.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/views_content_client/views_content_client.h"
 
 #if defined(OS_WIN)
 #include "content/public/app/startup_helper_win.h"
 #include "sandbox/win/src/sandbox_types.h"
 #endif
@@ skipping 14 matching lines @@
   virtual ~DemoAppListViewDelegate() {}
 
   app_list::AppListView* InitView(gfx::NativeView window_context);
 
   // Overridden from AppListViewDelegate:
   virtual void Dismiss() OVERRIDE;
   virtual void ViewClosing() OVERRIDE;
   virtual content::WebContents* GetStartPageContents() OVERRIDE;
 
  private:
-  app_list::PaginationModel pagination_model_;
   app_list::AppListView* view_;  // Weak. Owns this.
   content::BrowserContext* browser_context_;
   scoped_ptr<content::WebContents> web_contents_;
 
   DISALLOW_COPY_AND_ASSIGN(DemoAppListViewDelegate);
 };
 
 app_list::AppListView* DemoAppListViewDelegate::InitView(
     gfx::NativeView window_context) {
   // Note AppListView takes ownership of |this| on the next line.
   view_ = new app_list::AppListView(this);
   view_->InitAsBubbleAtFixedLocation(window_context,
-                                     &pagination_model_,
+                                     0,
                                      gfx::Point(300, 300),
                                      views::BubbleBorder::FLOAT,
                                      false /* border_accepts_events */);
 
   // Populate some apps.
   GetTestModel()->PopulateApps(kInitialItems);
   app_list::AppListItemList* item_list = GetTestModel()->top_level_item_list();
   ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
   gfx::Image test_image = rb.GetImageNamed(IDR_DEFAULT_FAVICON_32);
   for (size_t i = 0; i < item_list->item_count(); ++i) {
@@ skipping 41 matching lines @@
   content::InitializeSandboxInfo(&sandbox_info);
   ui::ViewsContentClient views_content_client(instance, &sandbox_info);
 #else
 int main(int argc, const char** argv) {
   ui::ViewsContentClient views_content_client(argc, argv);
 #endif
 
   views_content_client.set_task(base::Bind(&ShowAppList));
   return views_content_client.RunMain();
 }