Fix hang in DirectoryWatcherTest.WatchCreatedDirectory on Windows.
Fix hang in DirectoryWatcherTest.WatchCreatedDirectory on Windows.

TBR=evan

Review URL: http://codereview.chromium.org/109008

git-svn-id: http://src.chromium.org/svn/trunk/src@15288 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 2e8699e2c9756f00c1f65c73a53a8d0617853a09
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser