Apple does the same. Most recently, "Hey, let's steal pull down notifications, guys. No worries that clearly we did not invent it." It's gone on from all sides, so let's no pretend Google is a one-trick pony doing something that's never been done before.
Well there is no patent on the pulldown so it's a little different. I think the only patent case that Apple has "lost" (and by that I mean they're obviously going to appeal) is the iCloud/Motorola cloud patent thing.
And if we're going tit for tat, didn't Google "steal" how to make folders in ICS from iOS? Everyone copies, I don't get why there's such an outcry when Apple does...
There's a difference between copying a software feature and using a patent knowingly without licensing it....