Fix cpplint errors in url_request_context_getter.cc
Fix cpplint errors in url_request_context_getter.cc

brave/brightray,paulcbetts/brightray,deepak1556/brightray,lakshmi-srinivas/brightray,lakshmi-srinivas/brightray,hokein/brightray,bbondy/brightray,tejaspathak/brightray,atom/brightray,deepak1556/brightray,tejaspathak/brightray,paulcbetts/brightray,bbondy/brightray,brave/brightray,lakshmi-srinivas/brightray,hokein/brightray,atom/brightray