Remove Clone() from CannedBrowsingData*Helper classes

chrome/browser/browsing_data/browsing_data_database_helper.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 CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_DATABASE_HELPER_H_
 #define CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_DATABASE_HELPER_H_
 
 #include <list>
 #include <set>
 #include <string>
@@ skipping 97 matching lines @@
     // The operator is needed to store |PendingDatabaseInfo| objects in a set.
     bool operator<(const PendingDatabaseInfo& other) const;
 
     GURL origin;
     std::string name;
     std::string description;
   };
 
   explicit CannedBrowsingDataDatabaseHelper(Profile* profile);
 
-  // Return a copy of the database 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.
-  CannedBrowsingDataDatabaseHelper* Clone();
-
   // Add a database to the set of canned databases that is returned by this
   // helper.
   void AddDatabase(const GURL& origin,
                    const std::string& name,
                    const std::string& description);
 
   // Clear the list of canned databases.
   void Reset();
 
   // True if no databases are currently stored.
@@ skipping 10 matching lines @@
       const base::Callback<void(const std::list<DatabaseInfo>&)>& callback)
           OVERRIDE;
   virtual void DeleteDatabase(const std::string& origin_identifier,
                               const std::string& name) OVERRIDE;
 
  private:
   virtual ~CannedBrowsingDataDatabaseHelper();
 
   std::set<PendingDatabaseInfo> pending_database_info_;
 
-  Profile* profile_;
-
   DISALLOW_COPY_AND_ASSIGN(CannedBrowsingDataDatabaseHelper);
 };
 
 #endif  // CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_DATABASE_HELPER_H_