First pass at fixing guest browser cookies issue.

ui/app_list/app_list_model.cc

 // 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.
 
 #include "ui/app_list/app_list_model.h"
 
 #include <string>
 
 #include "ui/app_list/app_list_folder_item.h"
 #include "ui/app_list/app_list_item.h"
 #include "ui/app_list/app_list_model_observer.h"
 #include "ui/app_list/search_box_model.h"
 
 namespace app_list {
 
 AppListModel::AppListModel()
     : top_level_item_list_(new AppListItemList),
       search_box_(new SearchBoxModel),
       results_(new SearchResults),
       status_(STATUS_NORMAL),
       state_(INVALID_STATE),
       folders_enabled_(false),
       custom_launcher_page_enabled_(true) {
   top_level_item_list_->AddObserver(this);
 }
 
 AppListModel::~AppListModel() { top_level_item_list_->RemoveObserver(this); }
 
 void AppListModel::AddObserver(AppListModelObserver* observer) {
+  DLOG(ERROR) << "Adding " << observer;
   observers_.AddObserver(observer);
 }
 
 void AppListModel::RemoveObserver(AppListModelObserver* observer) {
-  observers_.RemoveObserver(observer);
+  DLOG(ERROR) << "Removing " << observer;
+    observers_.RemoveObserver(observer);
 }
 
 void AppListModel::SetStatus(Status status) {
   if (status_ == status)
     return;
 
   status_ = status;
   FOR_EACH_OBSERVER(AppListModelObserver,
                     observers_,
                     OnAppListModelStatusChanged());
@@ skipping 383 matching lines @@
   scoped_ptr<AppListItem> result = folder->item_list()->RemoveItem(item->id());
   result->set_folder_id("");
   if (folder->item_list()->item_count() == 0) {
     DVLOG(2) << "Deleting empty folder: " << folder->ToDebugString();
     DeleteItem(folder_id);
   }
   return result.Pass();
 }
 
 }  // namespace app_list