This issue, as reported to us by Aditya, is being tracked at http://code.google.com/p/chromium/issues/detail?id=2877. We would like to note that we discovered the outlined behavior several weeks ago internally, and publicly reported it to Webkit: https://bugs.webkit.org/show_bug.cgi?id=20661 While this is a low-priority bug, we do not believe it constitutes a security threat. The vector merely permits windows to be gracefully closed, rather than "killed", and applies only to windows that the malicious page could already script (that is, not an arbitrary third-party window). There is no risk of stealing user data, or any sort of remote code execution
