I just read on the earlier thread speculation that this was asked by the prosecution to set up later computer evidence that they have that he searched that area (presumably in looking for a good dump site).
I guess that could be the case, but I'm puzzled how that would have worked. If I had a dead body in the house and my goal was to dump it somewhere that I wouldn't likely be seen but also somewhere not too far away since I had small kids sleeping in the house, I would look up my own address on Google Maps (or Mapquest, etc). I would then start dragging the map around looking for ideas of places that would fit my criteria.
So, in that case it would be my address that showed up in the browser history. There is no way that the map web site can save everywhere you drag the map too. Writing all of that to disk would: 1) fill up your hard drive, 2) make the map horrendously slow.
If I knew of some area that might fit the criteria (Fielding Dr in this case), I'm not sure what the point of searching that area would be. I don't need a map, I know where I'm going. I guess you could say that it was to look at Google satellite images to see whether there were houses there yet. But, surely Brad would be smart enough to know that you can trust the satellite images since they are often a year or two out of date.
Now, to me, it would be pretty suspicious if he did any Google Maps (or something similar) in the middle of the night. But, I'm not sure why he would have searched specifically for the dump site.
I suppose another possibility could be that he remembered having driven by a new Toll Brothers neighborhood, but didn't recall exactly where it was. So, then he went to the Toll Brothers website and looked for neighborhoods in the area to refresh his memory. That would be pretty suspicious as well.