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

tracing/tracing/importer/user_model_builder.html

Index: tracing/tracing/importer/user_model_builder.html
diff --git a/tracing/tracing/importer/user_model_builder.html b/tracing/tracing/importer/user_model_builder.html
index 41a919fb135b896eb38fada59a0eaf3aca6ef890..b2722e868c5df140773d9ceadb784ae3eb0643e3 100644
--- a/tracing/tracing/importer/user_model_builder.html
+++ b/tracing/tracing/importer/user_model_builder.html
@@ -6,7 +6,7 @@ found in the LICENSE file.
 -->
 
 <link rel="import" href="/tracing/base/base.html">
-<link rel="import" href="/tracing/base/range_utils.html">
+<link rel="import" href="/tracing/base/math/range_utils.html">
 <link rel="import" href="/tracing/core/auditor.html">
 <link rel="import" href="/tracing/extras/chrome/cc/input_latency_async_slice.html">
 <link rel="import" href="/tracing/importer/find_input_expectations.html">
@@ -80,10 +80,10 @@ tr.exportTo('tr.importer', function() {
         var segment = new tr.model.um.Segment(
             timestamps[i], timestamps[i + 1] - timestamps[i]);
         segments.push(segment);
-        var segmentRange = tr.b.Range.fromExplicitRange(
+        var segmentRange = tr.b.math.Range.fromExplicitRange(
             segment.start, segment.end);
         for (var expectation of this.model.userModel.expectations) {
-          var expectationRange = tr.b.Range.fromExplicitRange(
+          var expectationRange = tr.b.math.Range.fromExplicitRange(
               expectation.start, expectation.end);
           if (segmentRange.intersectsRangeExclusive(expectationRange)) {
             segment.expectations.push(expectation);
@@ -156,8 +156,8 @@ tr.exportTo('tr.importer', function() {
     findIdleExpectations(otherUEs) {
       if (this.model.bounds.isEmpty) return;
 
-      var emptyRanges = tr.b.findEmptyRangesBetweenRanges(
-          tr.b.convertEventsToRanges(otherUEs),
+      var emptyRanges = tr.b.math.findEmptyRangesBetweenRanges(
+          tr.b.math.convertEventsToRanges(otherUEs),
           this.model.bounds);
       var expectations = [];
       var model = this.model;