Comment 3 for bug 664335

Cairo API - PDF Surfaces
 void cairo_pdf_surface_restrict_to_version
 enum cairo_pdf_version_t;
 void cairo_pdf_get_versions
 const char * cairo_pdf_version_to_string
<http://cairographics.org/manual/cairo-PDF-Surfaces.html#cairo-pdf-version-t>

Cairo API - Index of new symbols in Cairo 1.10
<http://cairographics.org/manual/index-1.10.html>

Changelog
PDF: Add cairo_pdf_surface_restrict_to_version API
<http://cgit.freedesktop.org/cairo/commit/?id=c4a57385fa2e69020f43519bea21b98182bf5fd7>