Remove Clone() from CannedBrowsingData*Helper classes

chrome/browser/browsing_data/browsing_data_appcache_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_APPCACHE_HELPER_H_
 #define CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_APPCACHE_HELPER_H_
 
 #include <map>
 
 #include "base/callback.h"
@@ skipping 42 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(BrowsingDataAppCacheHelper);
 };
 
 // This class is a thin wrapper around BrowsingDataAppCacheHelper that does not
 // fetch its information from the appcache service, but gets them passed as
 // a parameter during construction.
 class CannedBrowsingDataAppCacheHelper : public BrowsingDataAppCacheHelper {
  public:
   explicit CannedBrowsingDataAppCacheHelper(Profile* profile);
 
-  // Return a copy of the appcache helper. Only one consumer can use the
-  // StartFetching method at a time, so we need to create a copy of the helper
-  // every time we instantiate a cookies tree model for it.
-  CannedBrowsingDataAppCacheHelper* Clone();
-
   // Add an appcache to the set of canned caches that is returned by this
   // helper.
   void AddAppCache(const GURL& manifest_url);
 
   // Clears the list of canned caches.
   void Reset();
 
   // True if no appcaches are currently stored.
   bool empty() const;
 
   // Returns the number of app cache resources.
   size_t GetAppCacheCount() const;
 
   // Returns a current map with the |AppCacheInfoVector|s per origin.
   const OriginAppCacheInfoMap& GetOriginAppCacheInfoMap() const;
 
   // BrowsingDataAppCacheHelper methods.
   virtual void StartFetching(const base::Closure& completion_callback) OVERRIDE;
   virtual void DeleteAppCacheGroup(const GURL& manifest_url) OVERRIDE;
 
  private:
   virtual ~CannedBrowsingDataAppCacheHelper();
 
-  Profile* profile_;
-
   DISALLOW_COPY_AND_ASSIGN(CannedBrowsingDataAppCacheHelper);
 };
 
 #endif  // CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_APPCACHE_HELPER_H_