Refactor app list event handling and prerendering.

ui/app_list/views/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_VIEWS_CONTENTS_VIEW_H_
 #define UI_APP_LIST_VIEWS_CONTENTS_VIEW_H_
 
 #include <map>
 
 #include "base/basictypes.h"
@@ skipping 85 matching lines @@
   SearchResultListView* search_results_view() { return search_results_view_; }
   views::View* GetPageView(int index);
 
   // Adds a blank launcher page. For use in tests only.
   void AddBlankPageForTesting();
 
   // Overridden from views::View:
   virtual gfx::Size GetPreferredSize() const OVERRIDE;
   virtual void Layout() OVERRIDE;
   virtual bool OnKeyPressed(const ui::KeyEvent& event) OVERRIDE;
-  virtual bool OnMouseWheel(const ui::MouseWheelEvent& event) OVERRIDE;
 
   // Overridden from PaginationModelObserver:
   virtual void TotalPagesChanged() OVERRIDE;
   virtual void SelectedPageChanged(int old_selected, int new_selected) OVERRIDE;
   virtual void TransitionStarted() OVERRIDE;
   virtual void TransitionChanged() OVERRIDE;
 
   // Returns the pagination model for the ContentsView.
   const PaginationModel& pagination_model() { return pagination_model_; }
 
@@ skipping 19 matching lines @@
   // view is inserted as a child of the ContentsView, and a button with
   // |resource_id| is added to the ContentsSwitcherView. The page is associated
   // with the name |named_page|. Returns the index of the new page.
   int AddLauncherPage(views::View* view, int resource_id, NamedPage named_page);
 
   // Gets the PaginationModel owned by the AppsGridView.
   // Note: This is different to |pagination_model_|, which manages top-level
   // launcher-page pagination.
   PaginationModel* GetAppsPaginationModel();
 
-  // Overridden from ui::EventHandler:
-  virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
-  virtual void OnScrollEvent(ui::ScrollEvent* event) OVERRIDE;
-
   // Special sub views of the ContentsView. All owned by the views hierarchy.
   AppsContainerView* apps_container_view_;
   SearchResultListView* search_results_view_;
   StartPageView* start_page_view_;
 
   AppListMainView* app_list_main_view_;     // Parent view, owns this.
   // Sibling view, owned by |app_list_main_view_|.
   ContentsSwitcherView* contents_switcher_view_;
 
   scoped_ptr<views::ViewModel> view_model_;
   // Maps NamedPage onto |view_model_| indices.
   std::map<NamedPage, int> named_page_to_view_;
 
   // The page that was showing before ShowSearchResults(true) was invoked.
   int page_before_search_;
 
   // Manages the pagination for the launcher pages.
   PaginationModel pagination_model_;
 
   DISALLOW_COPY_AND_ASSIGN(ContentsView);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_VIEWS_CONTENTS_VIEW_H_