[tracing] Move math utilities from base into their own subdirectory (attempt 2)

tracing/tracing/ui/base/scatter_chart_test.html

Index: tracing/tracing/ui/base/scatter_chart_test.html
diff --git a/tracing/tracing/ui/base/scatter_chart_test.html b/tracing/tracing/ui/base/scatter_chart_test.html
index a2072f845e1144cc841add6a14f5306b0c9f8ff8..b79fb53ae49c6724e9ad505b8f4471f61010b385 100644
--- a/tracing/tracing/ui/base/scatter_chart_test.html
+++ b/tracing/tracing/ui/base/scatter_chart_test.html
@@ -39,12 +39,12 @@ tr.b.unittest.testSuite(function() {
     var mouseDown = undefined;
 
     function updateBrushedRange(e) {
-      var xRange = new tr.b.Range();
+      var xRange = new tr.b.math.Range();
       if (e.x !== mouseDown.x) {
         xRange.addValue(mouseDown.x);
         xRange.addValue(e.x);
       }
-      var yRange = new tr.b.Range();
+      var yRange = new tr.b.math.Range();
       if (e.y !== mouseDown.y) {
         yRange.addValue(mouseDown.y);
         yRange.addValue(e.y);