Small cosmetic change - simplify retry logic We can avoid redundant variables if we'll use standard python's try-retry-fail construct. Review URL: http://codereview.chromium.org/6880339 git-svn-id: svn://svn.chromium.org/native_client/trunk/src/third_party@5215 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2