Roll src/tools/swarming_client/ df6e95e76..7f63a272f (52 commits).

Include fixes.

https://chromium.googlesource.com/external/swarming.client.git/+log/df6e95e76698..7f63a272f7d9

$ git log df6e95e76..7f63a272f --date=short --no-merges --format='%ad %ae %s'
2016-07-12 maruel Add default output directory name.
2016-07-07 nicholaslin Fix stream_client() in bootstrap.py.
2016-06-23 tansell luci-py: Making __file__ usage unicode safe.
2016-06-23 nodir run_isolated: change cipd package flags
2016-06-22 borenet Add --cipd-package flag to swarming.py
2016-06-22 maruel Fix encoding for isolateserver_smoke_test.
2016-06-20 bpastene Correct ${SWARMING_BOT_FILE} run_isolated value documentation.
2016-06-16 nodir swarming: do not leak cache dirs in tests
2016-06-15 nodir swarming-cipd: custom installation paths
2016-06-14 nodir swarming-cipd: fix for Windows
2016-06-10 bpastene Change swarming's on_before_task hook to dump bot state to a file.
2016-06-10 maruel Add command to cancel a task.
2016-06-09 nodir run_isolated.py: install CIPD packages
2016-06-07 vadimsh Do not rely on IP whitelist during bot bootstrap process.
2016-06-07 vadimsh Send authorization headers when calling Swarming backend.
2016-06-03 nodir Fix abstraction leak in LocalCache implementations
2016-06-03 vadimsh Add file_path.atomic_replace function.
2016-06-03 nodir refactor isolate stats protocol
2016-06-01 kjlubick Clean out the isolate cache after every poll
2016-05-31 vadimsh Increase timeouts in threading_utils_test.py.
2016-05-30 maruel Inhibit OS error reporting in python processes.
2016-05-27 nodir task_runner: always use run_isolated
2016-05-25 maruel Changing license header, again!
2016-05-25 maruel Add deployment documentation and generally improve the doc.
2016-05-24 nodir run_isolated: fix python path
2016-05-17 dnj Add LogDog Python client library.
2016-05-13 nodir Do not add empty option group
2016-05-12 maruel Backport two subprocess42 fixes done in recipe_engine.
2016-05-12 nodir swarming: change meaning of inputs_ref
2016-05-06 iannucci Fix bug in subprocess42 with super-fast processes.
2016-05-03 nodir run_isolated: close storage
2016-05-03 nodir run_isolated: support non-isolated commands
2016-04-29 nodir run_isolated: move isolation stats from map_and_run
2016-04-29 nodir swarming: add fs.ensure_dir
2016-04-29 borenet Add diff_isolates.py script
2016-04-21 sergeyberezin luci-py: roll infra_libs to b6cb5db
2016-04-15 sergeyberezin luci-py: roll infra_libs / gae_ts_mon to 4d74a66
2016-04-13 maruel Enforce users to specify a 'pool' dimension when triggering a task.
2016-04-13 maruel Strip xsrf_client.
2016-04-13 maruel Use PerformanceStats generated by run_isolated.
2016-04-08 maruel Automatically trim the isolated cache on bot startup.
2016-04-08 maruel Make run_isolated trim as it is downloading files.
2016-04-08 maruel Stop choosing $TMPDIR as a safe place to create hardlinks on OSX.
2016-04-08 maruel Remove require_command arg from fetch_isolated().
2016-04-05 maruel Change run_isolated.py to output statistics in its json output file.
2016-04-05 maruel Update copyright notice from Swarming to LUCI; add AUTHORS and CONTRIBUTORS.
2016-03-29 sergeyberezin luci-py: Roll ts_mon to 9f215df
2016-03-17 maruel Fix run_on_bots.py.
2016-03-17 maruel Fix url_open() with gzip encoding.
2016-03-16 maruel Add 'is_fine'; fix 'swarming.zip attributes'; update httplib2; add logging.
2016-03-03 sergeyberezin Roll ts_mon to 4b3e37f
2016-03-01 maruel Print an error when running swarming.py reproduce twice in a row.

R=nicholaslin@google.com
TBR=agrieve@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2146913002
Cr-Commit-Position: refs/heads/master@{#405172}

DEPS

@@ -44,7 +44,7 @@ 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': 'df6e95e7669883c8fe9ef956c69a544154701a49',
+  'swarming_revision': '7f63a272f7d9785ce41b6d10bb3106c49a968e57',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling ANGLE
   # and whatever else without interference from each other.

build/secondary/tools/swarming_client/isolate.pydeps

 # Generated by running:
 #   build/print_python_deps.py --root tools/swarming_client --output build/secondary/tools/swarming_client/isolate.pydeps --whitelist tools/swarming_client/third_party tools/swarming_client/isolate.py
 auth.py
+cipd.py
 isolate.py
 isolate_format.py
 isolated_format.py
@@ -213,6 +214,7 @@ third_party/uritemplate/__init__.py
 utils/__init__.py
 utils/file_path.py
 utils/fs.py
+utils/large.py
 utils/logging_utils.py
 utils/lru.py
 utils/net.py