enable brush for bar resizing test

to better test #1134

Author: gordonwoodhull

web/resizing/resizing-bar.html

@@ -29,7 +29,7 @@
     .width(window.innerWidth-20)
     .height(window.innerHeight-20)
     .x(d3.scale.linear().domain([6,20]))
-    .brushOn(false)
+    .brushOn(true)
     .xAxisLabel("This is the X Axis!!")
     .yAxisLabel("This is the Y Axis!")
     .dimension(runDimension)