Yeah... this one threw me for a loop while I was reading the post... then I realized it. In OS X the whole top of the window is a continuous gradient (all the way from the top edge to the bottom of the primary toolbar). So the OP's complaint appears to be that that the Chrome window renders as though it's in Window/Linux instead of Mac OS X even though it has the brushed aluminum look. This also goes for the "Non-native behavior, Native look" point. In OS X you can drag from anywhere on the gradient, while in Chrome it just "looks" like it's doing shiny Cocoa things.
