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 {
 
 ClientId::ClientId() : name_space(""), id("") {}
 
 ClientId::ClientId(std::string name_space, std::string id)
     : name_space(name_space), id(id) {}
 
 bool ClientId::operator==(const ClientId& client_id) const {
   return name_space == client_id.name_space && id == client_id.id;
 }
@@ skipping 48 matching lines @@
          client_id == other.client_id &&
          file_path == other.file_path &&
          creation_time == other.creation_time &&
          last_access_time == other.last_access_time &&
          expiration_time == other.expiration_time &&
          access_count == other.access_count &&
          title == other.title &&
          flags == other.flags;
 }
 
-GURL OfflinePageItem::GetOfflineURL() const {
-  return net::FilePathToFileURL(file_path);
-}
-
 bool OfflinePageItem::IsExpired() const {
   return creation_time < expiration_time;
 }
 
 }  // namespace offline_pages