> According to the official release notes, this vulnerability involves a memory mismanagement bug in a part of Chrome called FileReader. That’s a programming tool that makes it easy for web developers to pop up menus and dialogs asking you to choose from a list of local files, for example when you want to pick a file to upload or an attachment to add to your webmail.

It sounds like the bug occurs interacting with external code, win32 or equivalent. Even if chrome were written in a "safe" language this section would likely be in unsafe block.