By , , (Reuters) - U.S. oil majors Chevron Corp and Exxon Mobil Corp cut spending aggressively in the third quarter in a race to offset weak trends in fuel demand caused by the COVID-19 pandemic, though the former managed a slim profit.Exxon posted its third straight quarter of losses on Friday and reduced spending plans for the coming year.In common with others in the sector, the two are laying off a substantial portion of their workforce and expect to cut costs further as they try to reverse years of weak stock performance, worsened by the impact of movement restrictions.U.S. oil prices...…By , , (Reuters) - U.S. oil majors Chevron Corp and Exxon Mobil Corp cut spending aggressively in the third quarter in a race to offset weak trends in fuel demand caused by the COVID-19 pandemic, though the former managed a slim profit.Exxon posted its third straight quarter of losses on Friday and reduced spending plans for the coming year.In common with others in the sector, the two are laying off a substantial portion of their workforce and expect to cut costs further as they try to reverse years of weak stock performance, worsened by the impact of movement restrictions.U.S. oil prices...WW…