Remove Clone() from CannedBrowsingData*Helper classes

chrome/browser/browsing_data/browsing_data_channel_id_helper.cc

 // Copyright 2014 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_channel_id_helper.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 147 matching lines @@
     net::URLRequestContextGetter* request_context) {
   return new BrowsingDataChannelIDHelperImpl(request_context);
 }
 
 CannedBrowsingDataChannelIDHelper::
 CannedBrowsingDataChannelIDHelper() {}
 
 CannedBrowsingDataChannelIDHelper::
 ~CannedBrowsingDataChannelIDHelper() {}
 
-CannedBrowsingDataChannelIDHelper*
-CannedBrowsingDataChannelIDHelper::Clone() {
-  DCHECK_CURRENTLY_ON(BrowserThread::UI);
-  CannedBrowsingDataChannelIDHelper* clone =
-      new CannedBrowsingDataChannelIDHelper();
-
-  clone->channel_id_map_ = channel_id_map_;
-  return clone;
-}
-
 void CannedBrowsingDataChannelIDHelper::AddChannelID(
     const net::ChannelIDStore::ChannelID& channel_id) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   channel_id_map_[channel_id.server_identifier()] =
       channel_id;
 }
 
 void CannedBrowsingDataChannelIDHelper::Reset() {
   channel_id_map_.clear();
 }
@@ skipping 26 matching lines @@
   for (ChannelIDMap::iterator i = channel_id_map_.begin();
        i != channel_id_map_.end(); ++i)
     channel_id_list.push_back(i->second);
   completion_callback_.Run(channel_id_list);
 }
 
 void CannedBrowsingDataChannelIDHelper::DeleteChannelID(
     const std::string& server_id) {
   NOTREACHED();
 }