misc cleanup of Compiler::run

This assumes patch from 1534883005 though still needs to rename
validateAndGenerateBuildAttributes to  dumpBuildAttributes

BUG=
R=stichnot@chromium.org

Review URL: https://codereview.chromium.org/1541063002 .

Patch from Reed Kotler <rkotlerimgtec@gmail.com>.
1 file changed