Google may not be making a phone, but it sure is spending a lot of money to act like it — and a lot of that cash is splashing down in the Charles River. In Boston, the search giant is making unsolicited bids for the services of every mobile software whiz it can find. And its real-estate agents are on the hunt for an additional 200,000 square feet of office space in the area, on top of its existing facilities in Cambridge, Mass. Current candidates are 301 Binney Street, shown here, and a yet-to-be developed building at East Kendall Street. That should be plenty of space for engineers to spin their wheels sketching out never-to-be-released versions of the GooglePhone.