1// Copyright (c) 2011 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef CHROME_RENDERER_PLAYBACK_EXTENSION_H_
6#define CHROME_RENDERER_PLAYBACK_EXTENSION_H_
7
8namespace v8 {
9class Extension;
10}
11
12namespace extensions_v8 {
13
14// Inject code which overrides a few common JS functions for implementing
15// randomness.  In order to implement effective record & playback of
16// websites, it is important that the URLs not change.  Many popular web
17// based apps use randomness in URLs to unique-ify urls for proxies.
18// Unfortunately, this breaks playback.
19// To work around this, we take the two most common client-side randomness
20// generators and make them constant.  They really need to be constant
21// (rather than a constant seed followed by constant change)
22// because the playback mode wants flexibility in how it plays them back
23// and cannot always guarantee that requests for randomness are played back
24// in exactly the same order in which they were recorded.
25class PlaybackExtension {
26 public:
27  static v8::Extension* Get();
28};
29
30}  // namespace extensions_v8
31
32#endif  // CHROME_RENDERER_PLAYBACK_EXTENSION_H_
33