Remove Clone() from CannedBrowsingData*Helper classes

chrome/browser/browsing_data/browsing_data_file_system_helper.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 "chrome/browser/browsing_data/browsing_data_file_system_helper.h"
 
 #include <set>
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
@@ skipping 176 matching lines @@
 // static
 BrowsingDataFileSystemHelper* BrowsingDataFileSystemHelper::Create(
     storage::FileSystemContext* filesystem_context) {
   return new BrowsingDataFileSystemHelperImpl(filesystem_context);
 }
 
 CannedBrowsingDataFileSystemHelper::CannedBrowsingDataFileSystemHelper(
     Profile* profile) {
 }
 
-CannedBrowsingDataFileSystemHelper::CannedBrowsingDataFileSystemHelper() {
-}
-
 CannedBrowsingDataFileSystemHelper::~CannedBrowsingDataFileSystemHelper() {}
 
-CannedBrowsingDataFileSystemHelper*
-    CannedBrowsingDataFileSystemHelper::Clone() {
-  DCHECK_CURRENTLY_ON(BrowserThread::UI);
-  CannedBrowsingDataFileSystemHelper* clone =
-      new CannedBrowsingDataFileSystemHelper();
-  // This list only mutates on the UI thread, so it's safe to work with it here
-  // (given the DCHECK above).
-  clone->file_system_info_ = file_system_info_;
-  return clone;
-}
-
 void CannedBrowsingDataFileSystemHelper::AddFileSystem(
     const GURL& origin,
     const storage::FileSystemType type,
     const int64 size) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   // This canned implementation of AddFileSystem uses an O(n^2) algorithm; which
   // is fine, as it isn't meant for use in a high-volume context. If it turns
   // out that we want to start using this in a context with many, many origins,
   // we should think about reworking the implementation.
   bool duplicate_origin = false;
@@ skipping 32 matching lines @@
 }
 
 void CannedBrowsingDataFileSystemHelper::StartFetching(
     const base::Callback<void(const std::list<FileSystemInfo>&)>& callback) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   DCHECK(!callback.is_null());
 
   BrowserThread::PostTask(
       BrowserThread::UI, FROM_HERE, base::Bind(callback, file_system_info_));
 }