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

chrome/browser/browsing_data_database_helper.cc

 // 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.
 
 #include "chrome/browser/browsing_data_database_helper.h"
 
 #include "base/callback.h"
 #include "base/file_util.h"
 #include "base/message_loop.h"
 #include "base/utf_string_conversions.h"
@@ skipping 139 matching lines @@
     const std::string& description)
     : origin(origin),
       name(name),
       description(description) {
 }
 
 CannedBrowsingDataDatabaseHelper::PendingDatabaseInfo::~PendingDatabaseInfo() {}
 
 CannedBrowsingDataDatabaseHelper::CannedBrowsingDataDatabaseHelper(
     Profile* profile)
-    : BrowsingDataDatabaseHelper(profile) {
+    : BrowsingDataDatabaseHelper(profile),
+      profile_(profile) {
+}
+
+CannedBrowsingDataDatabaseHelper* CannedBrowsingDataDatabaseHelper::Clone() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  CannedBrowsingDataDatabaseHelper* clone =
+      new CannedBrowsingDataDatabaseHelper(profile_);
+
+  base::AutoLock auto_lock(lock_);
+  clone->pending_database_info_ = pending_database_info_;
+  clone->database_info_ = database_info_;
+  return clone;
 }
 
 void CannedBrowsingDataDatabaseHelper::AddDatabase(
     const GURL& origin,
     const std::string& name,
     const std::string& description) {
   base::AutoLock auto_lock(lock_);
   pending_database_info_.push_back(PendingDatabaseInfo(
         origin, name, description));
 }
@@ skipping 52 matching lines @@
         info->description,
         web_security_origin.toString().utf8(),
         0,
         base::Time()));
   }
   pending_database_info_.clear();
 
   BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, NewRunnableMethod(
       this, &CannedBrowsingDataDatabaseHelper::NotifyInUIThread));
 }