Added support for sharding_supervisor's --retry-failed option and reverted log parsing to unsharded
Added support for sharding_supervisor's --retry-failed option and reverted log parsing to unsharded

BUG=93091

Review URL: http://codereview.chromium.org/7668001

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@97255 0039d316-1c4b-4281-b951-d872f2087c98

eunchong/build,eunchong/build,eunchong/build,eunchong/build