Remove OfflineURL from offline page

components/offline_pages/offline_page_item.cc

 // Copyright 2015 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 "components/offline_pages/offline_page_item.h"
 
-#include "net/base/filename_util.h"
-
 namespace offline_pages {
 
 namespace {
 const int kCurrentVersion = 1;
 }
 
 ClientId::ClientId() : name_space(""), id("") {}
 
 ClientId::ClientId(std::string name_space, std::string id)
     : name_space(name_space), id(id) {}
@@ skipping 45 matching lines @@
       creation_time(creation_time),
       last_access_time(creation_time),
       access_count(0),
       flags(NO_FLAG) {}
 
 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;
 }
 
 }  // namespace offline_pages