I’ve just tested Google Chrome for Linux on my Debian machine.
It has a nice theming feature, currently apparently suitable and used for making Chrome look native. That is, out of the box includes Chrome’s default theme, and the GTK theme which uses GTK buttons where possible, and uses the theme colors for Chrome-style widgets. On the screenshot, you can see how it looks with Debian-colored Clearlooks. Also, here’s a shot of the default theme.
(Update 5:51PM, CET: I didn’t figure out there’s a way to actually turn off the system window borders. There is. Wooo! Chrome is awesome.)
Most of the UI is GTK based – menus, configuration options, etc.
Dragging tabs around works nicely, just as under Windows; even transparency, if you have a compositing window manager such as Compiz. (Hint: KWin and Metacity also include compositing; I’m not sure where to turn it on for Metacity in the GUI, but it has a command line option “-c”.)
Google’s warning: Unless you’re a developer and can suffer crashes, as well as able to suffer lack of privacy features, don’t download and use this. It’s a developer’s preview only.
But seeing how great this browser already became (being significantly faster feeling than Iceweasel/Firefox on Linux, at least the 3.0 series) I’m getting great, great vibes for this browser’s future on GNU/Linux.