Roll tools/swarming_client/ to 6b1084e27ed2fff08777d89e681f2b897dc3d774.

Roll tools/swarming_client/ to 6b1084e27ed2fff08777d89e681f2b897dc3d774.

$ git log 37bcce2f5..6b1084e27 --date=short --format='%ad %ae %s' | sed 's/@chromium\.org//'
2014-09-30 maruel Add 'files', which will remove 'isolate_dependency_*'.
2014-09-30 maruel Remove isolate.py rewrite; this permits deleting a fair amount of code.

R=vadimsh@chromium.org
BUG=swarming:148
Committed: https://crrev.com/b3eb7650467f3868d384de67c1446c163901e656
Cr-Commit-Position: refs/heads/master@{#297529}

[M-A Ruel, 2014-09-30 21:22:07]

I decided to roll first and only then start modifying all .isolate. I will
likely do it in one shot, which will be a big mess. :)

[Vadim Sh., 2014-09-30 21:31:54]

lgtm

> I will likely do it in one shot, which will be a big mess.
At least we have trybots :)

[M-A Ruel, 2014-09-30 21:32:24]

The CQ bit was checked by maruel@chromium.org

[commit-bot: I haz the power, 2014-09-30 21:34:09]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/619703003/1

[commit-bot: I haz the power, 2014-09-30 22:30:35]

Committed patchset #1 (id:1) as 6bde6da17be0baa83f75342f90a5c36a97c60c04

[commit-bot: I haz the power, 2014-09-30 22:31:16]

Patchset 1 (id:??) landed as
https://crrev.com/b3eb7650467f3868d384de67c1446c163901e656
Cr-Commit-Position: refs/heads/master@{#297529}