I. To compare response rates (confirmed and unconfirmed, complete and partial responses) among patients randomized to receive rilotumumab plus erlotinib versus erlotinib. (Phase II) II. To evaluate the frequency and severity of toxicities associated with rilotumumab plus erlotinib versus erlotinib. (Phase II) III. To compare the response rates (confirmed and unconfirmed, complete and partial) among patients randomized to receive rilotumumab plus erlotinib versus erlotinib. (Phase III) IV. To evaluate the frequency and severity of toxicities associated with rilotumumab plus erlotinib versus erlotinib. (Phase III)