Remove OfflineURL from offline page

components/offline_pages/offline_page_item.cc

Index: components/offline_pages/offline_page_item.cc
diff --git a/components/offline_pages/offline_page_item.cc b/components/offline_pages/offline_page_item.cc
index 55cf901766ccf80c5043cd6937be3e3469c70345..ed53f6a2aad36c43e8f753f9ce0de2adcf0ba88c 100644
--- a/components/offline_pages/offline_page_item.cc
+++ b/components/offline_pages/offline_page_item.cc
@@ -4,8 +4,6 @@
 
 #include "components/offline_pages/offline_page_item.h"
 
-#include "net/base/filename_util.h"
-
 namespace offline_pages {
 
 namespace {
@@ -71,10 +69,6 @@ OfflinePageItem::OfflinePageItem(const OfflinePageItem& other) = default;
 OfflinePageItem::~OfflinePageItem() {
 }
 
-GURL OfflinePageItem::GetOfflineURL() const {
-  return net::FilePathToFileURL(file_path);
-}
-
 bool OfflinePageItem::IsExpired() const {
   return creation_time < expiration_time;
 }