Roll WebRTC 5699->5721.
[chromium-blink-merge.git] / chrome / renderer / playback_extension.h
blob9d10fe050cf274da42fbf53aa78bab0c38eb9cb5
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.
5 #ifndef CHROME_RENDERER_PLAYBACK_EXTENSION_H_
6 #define CHROME_RENDERER_PLAYBACK_EXTENSION_H_
8 namespace v8 {
9 class Extension;
12 namespace extensions_v8 {
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.
25 class PlaybackExtension {
26 public:
27 static v8::Extension* Get();
30 } // namespace extensions_v8
32 #endif // CHROME_RENDERER_PLAYBACK_EXTENSION_H_