Google corporate font

Google uses a font in its documents that you can see in the names of many of its products:

Check out this PDF file to see the font in different weights:

What font is that?


Actually, I just found another PDF that says it's Trade Gothic! It sure looks like it:

Well they're both grotesques but I don't think they look all that similar. Check the bowl of the lowercase a, and the width. Top terminal of t is sheared differently. Trade Gothic has a spurred G...

EDIT More info here