[telemetry] Fix perf/run_tests after r239318.

perf_tools no longer exists, so remove the import.
Previously, importing perf_tools would implicitly add telemetry to our sys.path, but now we have to do it explicitly. This is a Good Thing.

BUG=311380
TEST=tools/telemetry/run_tests; tools/perf/run_tests.
TBR=tonyg

Review URL: https://codereview.chromium.org/108193010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@240459 0039d316-1c4b-4281-b951-d872f2087c98
Roll swarm_client @ 9fc05789e3.

Includes revert of r240243.

$ git log aab3a62beb..9fc05789e3 --date=short --format="%ad %ae %s" | sed 's/@chromium\.org//'
2013-12-11 ganetsky Create a .gitignore file and add *.pyc to it
2013-12-11 maruel Stop signalling swarming error on Windows file locking.
2013-12-11 maruel Ensure variables are decoded to unicode.
2013-12-06 maruel Rename --command-variable to --extra-variables.
2013-12-06 maruel Add real variable support and split --variable in 3 different flags.
2013-12-05 vadimsh Add 'offset' parameter to StorageApi.fetch(...) method.
2013-12-05 maruel Change log message to be clearer.
2013-12-05 vadimsh Support custom HTTP headers in net.url_open.
2013-12-03 vadimsh Remove urllib2 support.
2013-12-03 vadimsh Wait for Storage's internal threads to finish before exiting.
2013-12-03 vadimsh Fix swarming_smoke_test.py and isolateserver_test.py.

R=vadimsh@chromium.org
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/113553003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@240460 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@240461 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 240461