DevTools: add text for Profiles panel welcome message.
DevTools: add text for Profiles panel welcome message.

Will be needed after the patch from https://bugs.webkit.org/show_bug.cgi?id=19268 got committed. No hurt to add this code now on DevTools side.

BUG=27617
TEST=none

Review URL: http://codereview.chromium.org/551026

git-svn-id: http://src.chromium.org/svn/trunk/src@36263 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: bc72867b2eb5dc1f99777ad135842ba81bbfed0d
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