Reduce flakiness of condition var unit test by reducing timing dependence.
Reduce flakiness of condition var unit test by reducing timing dependence.

Re-enable test, with hopes that external changes plus my changes
reduce flakyness sufficiently.

Also switch to using standard sleep method for better readability.

bug=3599
r=mark
Review URL: http://codereview.chromium.org/19729

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@13557 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser