Add SameSite (same_site) and Priority attributes to CefCookie (fixes issue #2524)

This change also restores the Chromium default values for the
SameSiteByDefaultCookies and CookiesWithoutSameSiteMustBeSecure features. See
https://www.chromium.org/updates/same-site for feature details and rollout
timeline.

libcef/common/net_service/net_service_util.h

@@ -11,6 +11,7 @@
 #include "include/internal/cef_types_wrappers.h"
 
 #include "base/memory/scoped_refptr.h"
+#include "net/cookies/cookie_constants.h"
 
 namespace net {
 class CanonicalCookie;
@@ -70,6 +71,9 @@ bool MakeCefCookie(const GURL& url,
                    const std::string& cookie_line,
                    CefCookie& cookie);
 
+net::CookieSameSite MakeCookieSameSite(cef_cookie_same_site_t value);
+net::CookiePriority MakeCookiePriority(cef_cookie_priority_t value);
+
 }  // namespace net_service
 
 #endif  // CEF_LIBCEF_COMMON_NET_SERVICE_NET_SERVICE_UTIL_H_