Roll tools/swarming_client/ to d6dbe76f98b3b8eaf98c01d16f990e277e8278dd.

Roll tools/swarming_client/ to d6dbe76f98b3b8eaf98c01d16f990e277e8278dd.

$ git log aea50658a..d6dbe76f9 --date=short --format='%ad %ae %s' | sed 's/@chromium\.org//'
2014-06-18 maruel Add --dump-json arg to swarming.py trigger.
2014-06-18 maruel Log more in isolateserver in debug level.
2014-06-16 maruel Add --task-name to examples and remove --shards.
2014-06-13 maruel Remove charade from third_party/requests/package; encoding detection.
2014-06-12 maruel Add net.url_retrieve() to simply download a file.

R=vadimsh@chromium.org
BUG=

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=278428

[Vadim Sh., 2014-06-18 19:14:59]

lgtm

[M-A Ruel, 2014-06-18 19:17:29]

The CQ bit was checked by maruel@chromium.org

[commit-bot: I haz the power, 2014-06-18 19:19:30]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/maruel@chromium.org/346603004/1

[commit-bot: I haz the power, 2014-06-19 01:49:40]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-06-19 01:49:40]

Try jobs failed on following builders:
  android_dbg_triggered_tests on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/android_dbg_triggered...)

[M-A Ruel, 2014-06-19 16:43:12]

The CQ bit was checked by maruel@chromium.org

[commit-bot: I haz the power, 2014-06-19 16:45:18]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/maruel@chromium.org/346603004/1

[M-A Ruel, 2014-06-19 18:22:02]

Committed patchset #1 manually as r278428 (presubmit successful).