Remove Clone() from CannedBrowsingData*Helper classes

chrome/browser/browsing_data/browsing_data_appcache_helper.cc

Index: chrome/browser/browsing_data/browsing_data_appcache_helper.cc
diff --git a/chrome/browser/browsing_data/browsing_data_appcache_helper.cc b/chrome/browser/browsing_data/browsing_data_appcache_helper.cc
index ddb9c709b0cb1b66b2279f49d73e264d210a5e70..613b193a00ce689c0cae365ef3ad7a68dbeb9a1a 100644
--- a/chrome/browser/browsing_data/browsing_data_appcache_helper.cc
+++ b/chrome/browser/browsing_data/browsing_data_appcache_helper.cc
@@ -88,20 +88,10 @@ void BrowsingDataAppCacheHelper::OnFetchComplete(int rv) {
 
 CannedBrowsingDataAppCacheHelper::CannedBrowsingDataAppCacheHelper(
     Profile* profile)
-    : BrowsingDataAppCacheHelper(profile),
-      profile_(profile) {
+    : BrowsingDataAppCacheHelper(profile) {
   info_collection_ = new content::AppCacheInfoCollection;
 }
 
-CannedBrowsingDataAppCacheHelper* CannedBrowsingDataAppCacheHelper::Clone() {
-  DCHECK_CURRENTLY_ON(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) {
   if (!BrowsingDataHelper::HasWebScheme(manifest_url))
     return;  // Ignore non-websafe schemes.