Fix use-after-free when switching profiles in the experimental app list.

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"
 #include "base/memory/weak_ptr.h"
 #include "base/timer/timer.h"
 #include "ui/app_list/app_list_export.h"
 #include "ui/app_list/views/apps_grid_view_delegate.h"
 #include "ui/app_list/views/search_box_view_delegate.h"
 #include "ui/app_list/views/search_result_list_view_delegate.h"
 #include "ui/views/view.h"
 
 namespace views {
 class Widget;
 }
 
 namespace app_list {
 
 class AppListItem;
 class AppListModel;
 class AppListViewDelegate;
 class ApplicationDragAndDropHost;
+class ContentsSwitcherView;
 class ContentsView;
 class PaginationModel;
 class SearchBoxView;
 
 // 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 {
@@ skipping 19 matching lines @@
   void OnStartPageSearchButtonPressed();
 
   SearchBoxView* search_box_view() const { return search_box_view_; }
 
   // 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_; }
+  ContentsSwitcherView* contents_switcher_view() const {
+    return contents_switcher_view_;
+  }
   AppListModel* model() { return model_; }
 
   // Returns true if the app list should be centered and in landscape mode.
   bool ShouldCenterWindow() const;
 
  private:
   class IconLoader;
 
-  void AddContentsView();
+  // Adds the ContentsView and the ContentsSwitcherView.
+  void AddContentsViews();
 
   // 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();
@@ skipping 16 matching lines @@
   // Overridden from SearchResultListViewDelegate:
   virtual void OnResultInstalled(SearchResult* result) OVERRIDE;
   virtual void OnResultUninstalled(SearchResult* result) OVERRIDE;
 
   AppListViewDelegate* delegate_;  // Owned by parent view (AppListView).
   AppListModel* model_;  // Unowned; ownership is handled by |delegate_|.
 
   SearchBoxView* search_box_view_;  // Owned by views hierarchy.
   ContentsView* contents_view_;  // Owned by views hierarchy.
 
+  // Owned by views hierarchy. NULL in the non-experimental app list.
+  ContentsSwitcherView* contents_switcher_view_;
+
   // 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_