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 8 namespace v8 { 9 class Extension; 10 } 11 12 namespace 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. 25 class PlaybackExtension { 26 public: 27 static v8::Extension* Get(); 28 }; 29 30 } // namespace extensions_v8 31 32 #endif // CHROME_RENDERER_PLAYBACK_EXTENSION_H_ 33