Greatly reduce the race window in ProcessSingleton - fix only for windows - Anantha has a good test to be commited RSN
Greatly reduce the race window in ProcessSingleton
- fix only for windows
- Anantha has a good test to be commited RSN

BUG=9593

Review URL: http://codereview.chromium.org/57082

git-svn-id: http://src.chromium.org/svn/trunk/src@13313 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 5b3b21006cc2ccced03f52b27f678937d3e4021a
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