Use copies of canned browsing data helpers to populate the cookies tree model.

chrome/browser/browsing_data_local_storage_helper.h

 // Copyright (c) 2011 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 CHROME_BROWSER_BROWSING_DATA_LOCAL_STORAGE_HELPER_H_
 #define CHROME_BROWSER_BROWSING_DATA_LOCAL_STORAGE_HELPER_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 92 matching lines @@
 };
 
 // This class is a thin wrapper around BrowsingDataLocalStorageHelper that does
 // not fetch its information from the local storage tracker, but gets them
 // passed as a parameter during construction.
 class CannedBrowsingDataLocalStorageHelper
     : public BrowsingDataLocalStorageHelper {
  public:
   explicit CannedBrowsingDataLocalStorageHelper(Profile* profile);
 
+  // Return a copy of the local storage helper. Only one consumer can use the
+  // StartFetching method at a time, so we need to create a copy of the helper
+  // everytime we instantiate a cookies tree model for it.
+  CannedBrowsingDataLocalStorageHelper* Clone();
+
   // Add a local storage to the set of canned local storages that is returned
   // by this helper.
   void AddLocalStorage(const GURL& origin);
 
   // Clear the list of canned local storages.
   void Reset();
 
   // True if no local storages are currently stored.
   bool empty() const;
 
   // BrowsingDataLocalStorageHelper methods.
   virtual void StartFetching(
       Callback1<const std::vector<LocalStorageInfo>& >::Type* callback);
   virtual void CancelNotification() {}
 
  private:
   virtual ~CannedBrowsingDataLocalStorageHelper();
 
   // Convert the pending local storage info to local storage info objects.
   void ConvertPendingInfoInWebKitThread();
 
   // Used to protect access to pending_local_storage_info_.
   mutable base::Lock lock_;
 
   // May mutate on WEBKIT and UI threads.
   std::vector<GURL> pending_local_storage_info_;
 
+  Profile* profile_;
+
   DISALLOW_COPY_AND_ASSIGN(CannedBrowsingDataLocalStorageHelper);
 };
 
 #endif  // CHROME_BROWSER_BROWSING_DATA_LOCAL_STORAGE_HELPER_H_