Allow test_shell to open relative paths, like "test_shell ."
Allow test_shell to open relative paths, like "test_shell ."

Review URL: http://codereview.chromium.org/11555

git-svn-id: http://src.chromium.org/svn/trunk/src@5813 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 88063c1d8c1ca9ad323e6f27a0b76ed25afc21f9
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