Roll swarming_client @ 7124e396edf2801f23cf794bb1f08119c491ccf6

$ git log def5b803e9..7124e396edf --date=short --format="%ad %ae %s" | sed 's/@chromium\.org//'
2014-01-09 maruel Convert read_only from a bool to an int with 3 levels.
2014-01-09 maruel Split all .isolate logic code from isolate.py into isolate_format.py.

R=csharp@chromium.org
BUG=

Review URL: https://codereview.chromium.org/132153002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243989 0039d316-1c4b-4281-b951-d872f2087c98

DEPS

@@ -59,7 +59,7 @@ 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": "def5b803e9faf94885a53ffc92e3f71fe3ef0dac",
+  "swarming_revision": "7124e396edf2801f23cf794bb1f08119c491ccf6",
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling openssl
   # and whatever else without interference from each other.