Roll tools/swarming_client/ to b19319e0bc258985a01760c4260fcfb2b338db2b.

$ git log 4eeada947..b19319e0b --date=short --format='%ad %ae %s' | sed 's/@chromium\.org//'
2014-04-27 vadimsh Refactor retry loop in swarming 'collect'.
2014-04-26 vadimsh Make task names unique by default by appending timestamp to them.
2014-04-18 vadimsh Print list of shards that are still running while waiting in 'collect'.

R=maruel@chromium.org
BUG=

Review URL: https://codereview.chromium.org/252023008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@266699 0039d316-1c4b-4281-b951-d872f2087c98

DEPS

@@ -61,7 +61,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling swarming_client
   # and whatever else without interference from each other.
-  "swarming_revision": "4eeada947e2fa4f48100ebb39b740bccabbc7747",
+  "swarming_revision": "b19319e0bc258985a01760c4260fcfb2b338db2b",
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling openssl
   # and whatever else without interference from each other.