Refactor Histogram relationship diagnostics.

tracing/tracing/value/ui/diagnostic_span.html

Index: tracing/tracing/value/ui/diagnostic_span.html
diff --git a/tracing/tracing/value/ui/diagnostic_span.html b/tracing/tracing/value/ui/diagnostic_span.html
index 64b2d4a68a9d753d67277856c6ab489ee6c04620..ae632d2b22eeeb946214f34ab9328dee10ed28aa 100644
--- a/tracing/tracing/value/ui/diagnostic_span.html
+++ b/tracing/tracing/value/ui/diagnostic_span.html
@@ -12,7 +12,6 @@ found in the LICENSE file.
 <link rel="import" href="/tracing/value/ui/date_range_span.html">
 <link rel="import" href="/tracing/value/ui/generic_set_span.html">
 <link rel="import" href="/tracing/value/ui/related_event_set_span.html">
-<link rel="import" href="/tracing/value/ui/related_histogram_map_span.html">
 <link rel="import" href="/tracing/value/ui/scalar_diagnostic_span.html">
 <link rel="import" href="/tracing/value/ui/tag_map_span.html">
 <link rel="import" href="/tracing/value/ui/unmergeable_diagnostic_set_span.html">
@@ -60,11 +59,11 @@ tr.exportTo('tr.v.ui', function() {
    * @param {!tr.v.Histogram} histogram
    * @return {Element}
    */
-  function createDiagnosticSpan(diagnostic, name, histogram) {
+  function createDiagnosticSpan(diagnostic, name, histogram, histograms) {
     const tagName = findElementNameForDiagnostic(diagnostic);
     const span = document.createElement(tagName);
     if (span.build === undefined) throw new Error(tagName);
-    span.build(diagnostic, name, histogram);
+    span.build(diagnostic, name, histogram, histograms);
     return span;
   }