Use C++11 deleted functions feature if available.

Implement DISALLOW_COPY_AND_ASSIGN and DISALLOW_IMPLICIT_CONSTRUCTORS
using C++11 deleted functions if possible.

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/19728003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15742 ce2b1a6d-e550-0410-aec6-3dcde31c8c00