Remove RelatedHistogramSet.

tracing/tracing/value/diagnostics/diagnostic_map_test.html

Index: tracing/tracing/value/diagnostics/diagnostic_map_test.html
diff --git a/tracing/tracing/value/diagnostics/diagnostic_map_test.html b/tracing/tracing/value/diagnostics/diagnostic_map_test.html
index 1fd3c4e69364c3c3a00a15955042124d7db2cbde..9b15ae7d1379d7147b22f4aa8393d3eb6a7fe519 100644
--- a/tracing/tracing/value/diagnostics/diagnostic_map_test.html
+++ b/tracing/tracing/value/diagnostics/diagnostic_map_test.html
@@ -18,7 +18,6 @@ tr.b.unittest.testSuite(function() {
     diagnostics.set('generic', new tr.v.d.GenericSet([{a: ['b', 3]}]));
     diagnostics.set('breakdown', new tr.v.d.Breakdown());
     diagnostics.set('events', new tr.v.d.RelatedEventSet());
-    diagnostics.set('set', new tr.v.d.RelatedHistogramSet());
     diagnostics.set('map', new tr.v.d.RelatedHistogramMap());
     diagnostics.set('histogram breakdown',
         new tr.v.d.RelatedHistogramBreakdown());
@@ -29,7 +28,6 @@ tr.b.unittest.testSuite(function() {
         tr.b.getOnlyElement(diagnostics.get('generic')));
     assert.instanceOf(clone.get('breakdown'), tr.v.d.Breakdown);
     assert.instanceOf(clone.get('events'), tr.v.d.RelatedEventSet);
-    assert.instanceOf(clone.get('set'), tr.v.d.RelatedHistogramSet);
     assert.instanceOf(clone.get('map'), tr.v.d.RelatedHistogramMap);
     assert.instanceOf(clone.get('histogram breakdown'),
         tr.v.d.RelatedHistogramBreakdown);
@@ -69,7 +67,7 @@ tr.b.unittest.testSuite(function() {
     };
     const generic = new tr.v.d.GenericSet(['generic diagnostic']);
     const generic2 = new tr.v.d.GenericSet(['generic diagnostic 2']);
-    const relatedSet = new tr.v.d.RelatedHistogramSet();
+    const relatedMap = new tr.v.d.RelatedHistogramMap();
     const events = new tr.v.d.RelatedEventSet([event]);
 
     // When Histograms are merged, first an empty clone is created with an empty
@@ -96,7 +94,7 @@ tr.b.unittest.testSuite(function() {
     // Merging unmergeable diagnostics should produce an
     // UnmergeableDiagnosticSet.
     const hist4 = new tr.v.Histogram('', tr.b.Unit.byName.count);
-    hist4.diagnostics.set('a', relatedSet);
+    hist4.diagnostics.set('a', relatedMap);
     hist.diagnostics.addDiagnostics(hist4.diagnostics);
     assert.instanceOf(hist.diagnostics.get('a'),
         tr.v.d.UnmergeableDiagnosticSet);
@@ -104,7 +102,7 @@ tr.b.unittest.testSuite(function() {
     assert.strictEqual(
         tr.b.getOnlyElement(generic), tr.b.getOnlyElement(diagnostics[0]));
     // Don't test merging relationships here.
-    assert.instanceOf(diagnostics[1], tr.v.d.RelatedHistogramSet);
+    assert.instanceOf(diagnostics[1], tr.v.d.RelatedHistogramMap);
 
     // UnmergeableDiagnosticSets are mergeable.
     const hist5 = new tr.v.Histogram('', tr.b.Unit.byName.count);
@@ -117,7 +115,7 @@ tr.b.unittest.testSuite(function() {
     assert.lengthOf(diagnostics, 3);
     assert.instanceOf(diagnostics[0], tr.v.d.GenericSet);
     assert.deepEqual(Array.from(diagnostics[0]), [...generic, ...generic2]);
-    assert.instanceOf(diagnostics[1], tr.v.d.RelatedHistogramSet);
+    assert.instanceOf(diagnostics[1], tr.v.d.RelatedHistogramMap);
     assert.instanceOf(diagnostics[2], tr.v.d.CollectedRelatedEventSet);
   });
 
@@ -125,7 +123,6 @@ tr.b.unittest.testSuite(function() {
     const aHist0 = new tr.v.Histogram('a', tr.b.Unit.byName.count);
     const bHist0 = new tr.v.Histogram('b', tr.b.Unit.byName.count);
 
-    aHist0.diagnostics.set('set', new tr.v.d.RelatedHistogramSet([bHist0]));
     let map = new tr.v.d.RelatedHistogramMap();
     map.set('c', bHist0);
     aHist0.diagnostics.set('map', map);
@@ -143,15 +140,13 @@ tr.b.unittest.testSuite(function() {
     const aHist1 = new tr.v.Histogram('a', tr.b.Unit.byName.count);
     const bHist1 = new tr.v.Histogram('b', tr.b.Unit.byName.count);
 
-    aHist1.diagnostics.set('set', new tr.v.d.RelatedHistogramSet([bHist1]));
     map = new tr.v.d.RelatedHistogramMap();
     map.set('c', bHist1);
     aHist1.diagnostics.set('map', map);
     breakdown = new tr.v.d.RelatedHistogramBreakdown();
     breakdown.set('d', bHist1);
     aHist1.diagnostics.set('breakdown', breakdown);
-    aHist1.diagnostics.set('unmergeable', new tr.v.d.RelatedHistogramSet(
-        [bHist1]));
+    aHist1.diagnostics.set('unmergeable', new tr.v.d.RelatedHistogramMap());
 
     const histograms1 = new tr.v.HistogramSet([aHist1, bHist1]);
 
@@ -172,10 +167,6 @@ tr.b.unittest.testSuite(function() {
     aMergedHist.diagnostics.mergeRelationships(aMergedHist);
     bMergedHist.diagnostics.mergeRelationships(bMergedHist);
 
-    const aMergedSet = aMergedHist.diagnostics.get('set');
-    assert.instanceOf(aMergedSet, tr.v.d.RelatedHistogramSet);
-    assert.strictEqual(bMergedHist, tr.b.getOnlyElement(aMergedSet));
-
     const aMergedMap = aMergedHist.diagnostics.get('map');
     assert.instanceOf(aMergedMap, tr.v.d.RelatedHistogramMap);
     assert.lengthOf(aMergedMap, 1);