This news should make KDE users happy. One of the issues with using any non-KDE apps with KDE is that you often get stuck with a GTK file dialog. In my opinion, the GTK file picker just does not measure up to the KDE one. A while back, someone added support for Mozilla Firefox, but Google Chrome / Chromium users still had to endure the GTK dialog.
Well, soon, the agony will be over, at least, it would seem so. According to a bug report on the Chromium website, the developers just added KDialog support a week ago. It will, of course, take time to make its way into a stable release, but the news is promising, nonetheless.