diff -r efd9c589177a -r c0b4a8b5a012 toolkit/javascript/d3/src/core/descending.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/javascript/d3/src/core/descending.js	Thu Apr 10 14:20:23 2014 +0200
@@ -0,0 +1,3 @@
+d3.descending = function(a, b) {
+  return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;
+};