Add more Windows-specific fonts to fallback path

MS Shell Dlg is the aliased font name that means "the one font that
shall always be available" per http://msdn.microsoft.com/en-us/library/windows/desktop/dd374112(v=vs.85).aspx
DirectWrite doesn't like that name, but we add the two fonts that it
can map to so that we can be very certain to succeed on retreiving a
font, even if Arial has gone missing.

R=eae@chromium.org
BUG=383542

Review URL: https://codereview.chromium.org/402503003

git-svn-id: svn://svn.chromium.org/blink/trunk@178380 bbb929c8-8fbe-4397-9dbb-9b2b20218538