My chrome handles did not look like yours. The only way to describe it is that it looks like the chrome grill. I don't know how Toyota applys the "chrome" but my OEM chrome handle was entirely chrome (chrome plating).
On your handle you can see white on the inside of the grip. Not so with the OEM chrome handles, as the complete handle is chrome plating. It is very apparent to me that what you have is an aftermarket chrome overlay handle that is secured with two-sided tape. I cannot verify that because although I have seen them on ebay, I have never seen them in person.
Toyota doesn't build crap like that handle. Their chrome handle is completely chrome.
You have chrome overlays. I am 99.99% positive.
Edit: here's a link to JA's site for the various years and their changes. I haven't looked for the differences, that's your job now:
http://www.top4runners.com/runhist/runhist42006.html