Foretinib (GSK1363089) is an investigational, oral, multikinase inhibitor involved in invasion, migration, and angiogenesis. This is a phase II, open label, uncontrolled, parallel, multi-cohort, multicenter 2-stage study to assess the safety and efficacy of foretinib and erlotinib combination therapy and foretinib monotherapy in genomic subpopulations of Non-Small-Cell Lung Cancer (NSCLC) subjects.