Disable logging for the Threading test in cctest/test-api by default.
Disable logging for the Threading test in cctest/test-api by default.

BUG=
TEST=test-api/Threading

Review URL: http://codereview.chromium.org/6893050

git-svn-id: b158db1e4b4ab85d4c9e510fdef4b1e8c614b15b@7684 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh