Move src/tools/isolate to src/tools/swarm_client as a DEPS.

tools/isolate/README.py

-#!/usr/bin/env python
-# coding=utf-8
-# Copyright (c) 2012 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-###
-# Run me to generate the documentation!
-###
-
-"""Test tracing and isolation infrastructure.
-
-Scripts are compartmentalized by their name:
-- trace_*.py: Tracing infrastructure scripts.
-- isolate_*.py: Executable isolation scripts. (TODO)
-- *_test_cases.py: Scripts specifically managing GTest executables.
-
-A few scripts have strict dependency rules:
-- run_test_cases.py, run_test_from_archive.py, shard.py and trace_inputs.py
-  depends on no other script so they can be run outside the checkout.
-- The pure tracing scripts (trace_inputs.py and trace_test_cases.py) do not know
-  about isolate infrastructure.
-- Scripts without _test_cases suffix do not know about GTest.
-- Scripts without isolate_ prefix do not know about the isolation
-  infrastructure. (TODO)
-
-See http://dev.chromium.org/developers/testing/isolated-testing for more info.
-"""
-
-import os
-import sys
-
-
-def main():
-  for i in sorted(os.listdir(os.path.dirname(os.path.abspath(__file__)))):
-    if not i.endswith('.py') or i == 'PRESUBMIT.py':
-      continue
-    module = __import__(i[:-3])
-    if hasattr(module, '__doc__'):
-      print module.__name__
-      print ''.join('  %s\n' % i for i in module.__doc__.splitlines())
-  return 0
-
-
-if __name__ == '__main__':
-  sys.exit(main())