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

chrome/browser/browsing_data_appcache_helper.cc

Index: chrome/browser/browsing_data_appcache_helper.cc
diff --git a/chrome/browser/browsing_data_appcache_helper.cc b/chrome/browser/browsing_data_appcache_helper.cc
index 7cd83c9e5a63d55a6827e3c236fda17e3b09d5ab..6a7e8ee44e25edc4fef78ac9ffec3edbb8ff3f2d 100644
--- a/chrome/browser/browsing_data_appcache_helper.cc
+++ b/chrome/browser/browsing_data_appcache_helper.cc
@@ -103,10 +103,20 @@ ChromeAppCacheService* BrowsingDataAppCacheHelper::GetAppCacheService() {
 
 CannedBrowsingDataAppCacheHelper::CannedBrowsingDataAppCacheHelper(
     Profile* profile)
-    : BrowsingDataAppCacheHelper(profile) {
+    : BrowsingDataAppCacheHelper(profile),
+      profile_(profile) {
   info_collection_ = new appcache::AppCacheInfoCollection;
 }
 
+CannedBrowsingDataAppCacheHelper* CannedBrowsingDataAppCacheHelper::Clone() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  CannedBrowsingDataAppCacheHelper* clone =
+      new CannedBrowsingDataAppCacheHelper(profile_);
+
+  clone->info_collection_->infos_by_origin = info_collection_->infos_by_origin;
+  return clone;
+}
+
 void CannedBrowsingDataAppCacheHelper::AddAppCache(const GURL& manifest_url) {
   typedef std::map<GURL, appcache::AppCacheInfoVector> InfoByOrigin;
   InfoByOrigin& origin_map = info_collection_->infos_by_origin;