Add new file render_thread_unittest.cc to windows project file for unit_tests.
Add new file render_thread_unittest.cc to windows project file for unit_tests.

Review URL: http://codereview.chromium.org/19201

git-svn-id: http://src.chromium.org/svn/trunk/src@8744 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: d05759aebea50a31d8abcf0686efb67611e7937e
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