Allow scroll events to open custom launcher pages.

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 40 matching lines @@
   void ResetForShow();
 
   void Close();
 
   void Prerender();
 
   void ModelChanged();
 
   SearchBoxView* search_box_view() const { return search_box_view_; }
 
-  // Gets the invisible widget that sits partly over the bottom of the app list,
-  // covering the collapsed-state custom page. May return nullptr, if the widget
-  // has not been initialized or has already been destroyed.
-  views::Widget* GetCustomPageClickzone() const;
-
   // If |drag_and_drop_host| is not NULL it will be called upon drag and drop
   // operations outside the application list.
   void SetDragAndDropHostOfCurrentAppList(
       ApplicationDragAndDropHost* drag_and_drop_host);
 
   ContentsView* contents_view() const { return contents_view_; }
   AppListModel* model() { return model_; }
   AppListViewDelegate* view_delegate() { return delegate_; }
 
   // Returns true if the app list should be centered and in landscape mode.
   bool ShouldCenterWindow() const;
 
   // Called when the search box's visibility is changed.
   void NotifySearchBoxVisibilityChanged();
 
-  // Initialize widgets that live inside the app list's main widget.
-  void InitWidgets();
-
   // Overridden from AppListModelObserver:
   void OnCustomLauncherPageEnabledStateChanged(bool enabled) override;
 
  private:
   class IconLoader;
 
   // Adds the ContentsView.
   void AddContentsViews();
 
   // Gets the PaginationModel owned by the AppsGridView.
@@ skipping 23 matching lines @@
   // Overridden from SearchResultListViewDelegate:
   void OnResultInstalled(SearchResult* result) override;
 
   AppListViewDelegate* delegate_;  // Owned by parent view (AppListView).
   AppListModel* model_;  // Unowned; ownership is handled by |delegate_|.
 
   // Created by AppListView. Owned by views hierarchy.
   SearchBoxView* search_box_view_;
   ContentsView* contents_view_;  // Owned by views hierarchy.
 
-  // Invisible widget that sits partly over the bottom of the app list, covering
-  // the collapsed-state custom page, and intercepts click events. Always use
-  // GetCustomPageClickzone() to access this (do not access it directly).
-  views::Widget* custom_page_clickzone_;  // Owned by the app list widget.
-
   // 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_