The feature sometimes prevents subsequent swarming bots to
delete the work directory on windows.

The data file is not kept on swarming bots anyways, therefore
this switches off the feature completely.

BUG=chromium:535160
LOG=n

Review URL: https://codereview.chromium.org/1468933002

Cr-Commit-Position: refs/heads/master@{#32168}

BUG=
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/273613005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21328 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Review URL: https://codereview.chromium.org/10919265

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12583 ce2b1a6d-e550-0410-aec6-3dcde31c8c00