Update "Bookmark Sync" string in options dialog.
Update "Bookmark Sync" string in options dialog.

This should be sentence-case rather than title-case for non-Linux,
and it shouldn't have a trailing colon on Linux.

BUG=27766

Review URL: http://codereview.chromium.org/395019

git-svn-id: http://src.chromium.org/svn/trunk/src@32073 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 8bd7d04a948f01551d49327c0ce3b46ece0b527d
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