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 dfa9835f9ee3e410bb2107910f7df6a7c30bdcae..41b96e0e919c46d8eed0d889d382ae404d6b82c8 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 {
 
 ClientId::ClientId() : name_space(""), id("") {}
@@ -74,10 +72,6 @@ bool OfflinePageItem::operator==(const OfflinePageItem& other) const {
          flags == other.flags;
 }
 
-GURL OfflinePageItem::GetOfflineURL() const {
-  return net::FilePathToFileURL(file_path);
-}
-
 bool OfflinePageItem::IsExpired() const {
   return creation_time < expiration_time;
 }